Tōhōshinki

The four leaders of the delinquent forces in Ishiyama High. Tōhōshinki is an acronym of their respective last names, Hidetora Tojo (東条 英虎, Tojo Hidetora), Aoi Kunieda (邦枝 葵, Kunieda Aoi), Hajime Kanzaki (神崎 一, Kanzaki Hajime), and Tatsuya Himekawa (姫川 竜也, Himekawa Tatsuya). In the English subtitled version of the anime by Crunchyroll, the abbreviation TKKH (using the first letters of their surnames) is used. While initially introduced as antagonists early in the series, the four later become Oga's most loyal followers, each gaining the King's Emblem (located on different parts of their body) that allows them to tap into Beelzebub's demon powers during fights to a level that allows them to go toe-to-toe with other demon contract holders.

Hajime Kanzaki (神崎 一, Kanzaki Hajime)

Voiced by: Tomokazu Sugita

The first of the four to be introduced, he was the closest to dominating the school at the time. A sadistic and malignant third year, he was sought out by Oga to be a replacement father for Beel, Oga hoping Kanzaki's purportedly sinister and malicious character would be more appealing to the demon baby than his own. However, after Kanzaki viciously humiliates Shiroyama, his most loyal underling and until then his right-hand man, Oga becomes enraged and punches Kanzaki through a top-story window, sending him to the hospital and further solidifying Beel's attachment to him. After that, Kanzaki loses his retinue, save for Shiroyama and Natsume (see below). He later consorted with Himekawa and Oga in order to pull down the powerful Tojo, but gets caught up with Himekawa in a fight against Tojo's underlings and is sent to the hospital again due to injuries contracted in the explosion that destroyed the school.

Later he begins to reciprocate the loyalty of his remaining subordinates - now better described as friends -, such as when he goes to get revenge for Shiroyama after he is beaten up by St. Ishiyama High students, and his character evolves in a more likable fashion. At St. Ishiyama, he seeks to preserve the reputation of the Ishiyama students against the advances of the six Horsemen (see below), and starts to show some loyalty to Oga and the others. His considerable and unwarranted pride is often depicted in comical fashion, such as when he intervenes to relieve Tojo, who is much stronger than he is, in a fight against a demon.

His fighting style is raw and brutal, and does not appear to have any technique, but is effective against the average thug. Even after being defeated by Oga, his reputation as a Tōhōshinki persists and he is greatly feared by lesser delinquents. It is implied that his family is wealthy and/or influential, and that he pushed that influence to achieve his status as a gang leader. On chapter 143, the reader learns that Kanzaki is indeed the second son of a yakuza family and has a little niece from his brother.

He wears a small chain hanging from his left ear and from a piercing below his mouth. It is revealed that Kanzaki becomes enraged if someone pulls the chain and in these occasions he becomes three times stronger than normal.^[31] Nevertheless, after being defeated by Oga, he was gradually displaced in the scale of strength, to the point of being harshly beaten by the Poltergeists in chapter 193 (see below). However, he was then branded with a secondary Zebub Spell, effectively becoming Beel's first human knight, and proceeded to defeat all of his opponents single-handedly.

Takeshi Shiroyama (城山武, Shiroyama Takeshi)

Voiced by: Kenji Nomura

Kanzaki's most devoted underling. A strong, tall third-year, he is nevertheless easily defeated by Oga with a single shot to the chin. Even after his humiliation by Kanzaki and the dissolution of the latter's gang, he remains attached to Kanzaki. Later, when he is sent to the hospital by St. Ishiyama students, Kanzaki visits upon him. He escapes the hospital to support Ishiyama against the Horsemen in the volleyball match, but is taken back by the staff. He is often seen acting as Kanzaki's voice of reason.

Shintarou Natsume (夏目慎太郎, Natsume Shintarou)

Voiced by: Daisuke Kishio

A soft-spoken, third-year student and an underling of Kanzaki, he shows exceptional interest in Oga and his exploits. Handsome and long-haired, he prefers to make lighthearted quips during frays to engaging in them personally. Though he rarely participates in fights himself, he is incredibly strong, taking out the MK5 by himself and even downing one of Tojo's underlings within seconds. From this it is implied that Natsume is significantly stronger than previously credited, as not even Kanzaki or Himekawa were capable of such a feat. He shows these fighting skills again when he blocks Gou Hiromichi from attacking Oga head on, later stating during their fight, "it's not really my style to go all out in a fight."

Tatsuya Himekawa (姫川竜也, Himekawa Tatsuya)

Voiced by: Ogino Seirou

He is the son of the "Himekawa Group", a financial zaibatsu, a third-year student and the second member of the Tohoshinki. Using money to solve his problems, he bribes friends and enemies into his employment, often turning the tables on dissident challengers by co-opting their own friends against them. This tactic proved completely useless on Oga, and Himekawa was the first victim of the Zebub Blast.^[32] Following his recovery, he groups himself together with Oga and Kanzaki in order to remove Tojo from power, but is caught up in the explosion with Kanzaki and most of the student body. He has a slightly outlandish appearance, including his hair in Pompadour hairstyle and his constant use of sunglasses, most often complete with a Hawaii shirt. For comedic effect, he is shown to be quite handsome without his glasses and with his hair brushed down, which makes him look like a completely different person.

Although a capable fighter, Himekawa uses underhanded tactics to prevail, such as having his opponents break their fists by punching a ceramic tile shield hidden under his shirt, or electrocuting them with a shock-baton (both are shown to be useless against Oga). In his first appearance, he resorted to outright criminal acts to lure Oga, such as kidnapping Furuichi and threatening to kill him and Hilda. He behaved quite viciously towards her, shooting her garments multiple times with a water gun filled with acid in search of a mobile phone.

After losing his gang and later at St. Ishiyama, his character also evolves in a more positive fashion. Like Kanzaki, he starts to show some loyalty to his colleagues, especially to Oga, even stopping an attack by Sakaki Mitsuteru against an unarmed Kunieda. His strategic skills prove useful when he clinches a deal with St. Ishiyama's teachers to prevent his and his colleagues' expulsion. He is also the source of outside information regarding other gangs and always seems to be in the knowing of what is going on outside the classroom. It is revealed in chapter 135 that he has abnormal puzzle-solving skills.

Even for the standards of upper class families, Himekawa is granted extravagant means by his family: his pocket money, for example is enough to acquire the proprietor rights over an Internet game. He used to live in a multiple-story elite condominium penthouse he purchased with his and his friend Kugayama's (see below) winnings in Internet wager games, but it got destroyed by Oga.

In contrast to the other Touhoushinki, none of his underlings can be called his friend, and he was left completely alone after his defeat at Oga's hands. However, he garnered some respect from the others after helping out in the search for Lord En (see below). Aside from that, he is sometimes seen with a young butler called Hasui,^[33] who is the only person who calls him by his given name. He is revealed to be the fourth person with a Zebub Symbol, only he is actually the 3rd Knight.

Aoi Kunieda (邦枝葵, Kunieda Aoi)

• Voiced by: Aki Toyosaki

Aoi is 17 years old, a second-year student and the third leader of the "strongest ladies of Kantou", the Red Tails.^[34] She is first introduced in disguise at the park taking care of her baby brother, Kouta,^[35] who is constantly mistaken as being Aoi's own child by the mothers at the park. She is the daughter of a local shrine keeper.^[36] Her nickname is Queen because she is the protector of all the girls at Ishiyama High from the men's "grubby hands".^[37] Because of Oga's dense personality, he has yet to realize that the girl he befriended at the park that Oga knows as "Aoi Kunie" and Kunieda are one and the same. Despite her tough personality, she has a rather girlish crush on Oga but refuses to admit this fact to others. She can feel Saotome using his demon power, which shows she has notable strength for a human.

Aoi differs from the other thugs at Ishiyama in that she has formal martial arts training from her grandfather, the master of the shingetsu style. She is also not a bully, and steers the leadership of the Red Tails towards preventing unnecessary fights in the school. This is what puts her first in collision course with Oga, as the latter is deemed by her to be responsible for most of recent violent events in the school. They have two exchanges: in neither does Oga return her attacks, limiting himself to evade them, first to let baby Beel assess her strength and thus find out whether she is a potential replacement for him; later, because a failure in communication leads Oga to believe that Aoi's condition to take Beel is that he should resist her charges. She is greatly impressed by Oga's speed and power, and misunderstands his advances on her (to get rid of Beel) as romantic interest. After he saves her from a plot by the MK5, she decides to leave the Red Tails and become a more disciplined person, and at the same time her crush on Oga increases. Later, she and the Red Tails intervene to stop the whole male student body of Ishiyama from attacking Oga, allowing him to proceed to a confrontation with Tojo unhindered.

She at first harboured some jealousy against Hilda, seeing her as a potential rival for Oga, but on discovering the truth about her and Baby Beel's true nature, their animosity becomes less pronounced. Later, it is Hilda who becomes jealous of Beel's attachment to Aoi.^[17]

She is a skilled swordswoman and martial artist, and possesses an immense amount of vitality and stamina, as well as impressive speed that is above Sakaki Mitsuteru's, who is known to be able to wield his sword at 250 km/h (however, she is not fast enough to hit Oga, who manages to evade even her best attacks with minor injuries). She can use any weapon she chooses in battle, and has even been shown to fight with nothing more than a ruler. She has shown the ability to assess opponents' strengths and weaknesses very quickly. Despite all this however, Hilda has noted that Aoi is still below Oga's level in terms of battle capabilities.

After being targeted by demons, she and Oga went on a training trip with her grandfather to improve their fighting skills. She then requested for advice on how to exorcise demons from her friend Isafuyu (see below). After training, she and Hilda fight again, and this time Kunieda proves to be a match for the demon maid. Hilda then notices that Kunieda has somehow learned to use demonic powers herself.^[17] It is later explained that Kunieda forged an alliance with a minor deity, Koma (see below), and becomes able to release demonic power, as sensed by Beel and Hilda.^[25] She become's the second of Beel's Knights, gaining her Zebub Symbol on her chest during her fight with Ringo.

Chiaki Tanimura (谷村 千秋, Tanimura Chiaki)

• Voiced by: Aoi Yūki

A first-year and leading member of the Red Tails. Chiaki rarely speaks and dispatches her enemies swiftly with a pair of modified air-guns hidden under her skirt (actually, she can use up to four guns at the same time). She is very loyal to Kunieda even after she leaves the gang, and is ready to shoot anyone other than Oga who makes advances on her. She is the first to recognise that Kunieda is in love with Oga and thinks it very cute, as opposed to Nene (see next). She is an expert video game player, often playing with her little brother, and Kanzaki gives her the nickname "Akichi" (an inversion of the syllables of her name) to signify her gaming persona.

Nene Oomori (大森 寧々, Oomori Nene)

• Voiced by: Ayahi Takagaki

Originally Kunieda Aoi's second-in-command, Nene is far more aggressive than her permissive leader. Though she often openly disagrees with and occasionally disobeys Kunieda, she is still her faithful wingman, balking vociferously when Kunieda opts to leave the Red Tails and relinquish the mantle of leadership to her. She takes it nevertheless and soon proves to be worthy of it, gaining the confidence and trust of the Red Tails as their fourth leader. Her weapon of preference are chains, which she uses proficiently to gain an advantage against stronger men. As Kunieda, she is a second-year student.

Yuka Hanazawa (花澤由加, Hanazawa Yuka)

• Voiced by: Haruka Tomatsu

A first-year student and a talkative member of the Red Tails who often makes embarrassing statements. She has long hair that is always adorned with a flower-shaped hairpin that can be used as a dagger. As a member of the Red Tails, she is a very good fighter and is not afraid of facing men. Lately, she and Kanzaki have been getting along, beginning when both witnessed Tojo's fight with a demon. In some recent chapters, it is lightly implied that she might have feelings for Kanzaki.

Hidetora Tojo (東条英虎, Tojo Hidetora)

Voiced by: Tomokazu Seki

The fourth, and by far the strongest, Tōhōshinki (his strength in comparison to Kunieda is not confirmed, though it can be implied that he is stronger than she indirectly thought from their other fights). He is introduced how a main antagonist in the anime and a third-year student, Tojo has an unexpected soft side towards smaller creatures and babies, though said creatures do not feel similarly towards him. He is mostly bored with weaklings and is always looking for a good fight, which subsequently leads to his interest towards Oga. He works multiple jobs and sometimes has to miss school because of them. He can feel Saotome using his demon power, which shows he has notable strength for a human. His fighting style is a rigid brutal force. He appears to possess an incredible amount of stamina, as he was able to take a full blow from Miki without so much as flinching. Tojo presents an immediate threat to anyone he faces and has shown a strong willingness to fight, even at the expense of his own body. He is also called by the nickname Tora by his friends.

His main adversary thus far has been Oga, and although he does show a certain amount of respect for him, it is clear that the battles they share are the only things that matter to him. Tojo is stronger and more resilient, but Oga is more agile and has a superior technique. They have had three skirmishes so far: in the first one, Oga was gaining the upper hand but got distracted by Tojo's tattoo and was sent flying (although the punch failed to knock him out - the first time someone resisted a punch by Tojo). In the second, Oga defeated him fair and square, if narrowly, after a protracted fight. Contrarily to Himekawa and Kanzaki, Tojo is very honourable and promptly acknowledges his defeat. Later his fighting skill increased and when they have a third, amicable fight, it ended in a draw.

He appears to know Nanami Shizuka, the female member of the Horsemen, quite well. She referred to him as Tora when they met after the volleyball match, and both went searching for Saotome afterwards.

He looks up to Saotome Zenjuurou (see below), and has copied the latter's royal seal in the form of a tattoo in order to resemble him. Contrarily to Oga, he actively seeks to fight against progressively stronger opponents, and has his eyes currently on Izuma (see below) and demons. However, he is not a bully and shows no real interest in attracting followers as Himekawa and Kanzaki. He tends to be more aloof in class, although he does show loyalty towards his colleagues. He and Oga are the only humans so far to have been able temporarily to hold their ground against demons without resort to demonic powers of their own.

After being nearly killed by a demon, Tojo receives basic instructions from Saotome on how to tackle this kind of adversary, and the teacher states that he is safe to improve his skill if left to his own devices, as Tojo's fighting is mostly driven by instinct. When he appears again, he begins to show superhuman strength and speed on par with Oga's, but the origin of those hasn't been explained.^[38] He is the third person revealed to be one of Beel's Knights, with his symbol appearing on his upper arm. His number, however, is 4.

Kaoru Jinno

Voiced by: Kentaro Tone

A long-haired, third-year underling of Tojo's. He has a calm attitude and is shown to be bookish, but is nevertheless a strong fighter, being able to defeat Himekawa and Kanzaki on his own easily.

Shoji Aizawa

Voiced by: Akimitsu Takase

Tojo's right-hand man and a third-year student. He wears sunglasses and has a cool attitude, and is a strong fighter. He has been able to evade one of Oga's attacks and even fight him briefly, although Oga had been taken by surprise. He and Kaoru are caught in the destruction of Ishiyama High and later share a hospital room with Kanzaki, Shiroyama and Himekawa.

Six Killer Elements

Also known as "Ishiyama's Six Upstarts", they are six first-years who make their appearance at Ishiyama when it is finally rebuilt. Each one leads their own gang. During the period when the students were scattered among different schools, they seem to have grown strong and confident enough to challenge Oga and the Tōhōshinki for the leadership of the school. They are divided in two tiers: the Three Kings and, above them, the Three Beasts.

Others

MK5

Named "Majide Kuukiyomenai 5 ningumi" [translation: The Unbelievably Tactless 5], this gang was suspended from school and is famous for its immense cruelty and poor hygiene. They always sport neckties and make a point of appearing in choreographic fashion, often with comical effects. Despite this, they are relatively weak in comparison to most of the other characters and have yet to win a single fight; they are almost always quickly defeated in an instant. They are distinct from most other thugs in that they use firearms loaded with actual bullets, and have even gone so far as to try to eliminate Nene Oomori. Members consist of:

Ikari (碇): Short, snarky, and black-haired. The acting leader.

Shimamura (嶋村): Marked by a heart-shaped tattoo on his face. Uses a pistol.

Chatou (茶藤): Bald and scarred. Uses nunchuks.

Nakata (中田): Chapeaued and bespectacled. Carries a rifle.

Buu (武宇): Immense, muscular, and has long hair.

Shimokawa (下川)

Voiced by: Hidenori Takahashi

Better known as "Good Night Shimokawa", he is a second-year thug who has a crush on Kunieda and is one of the first to be defeated by Oga. His nickname derives from his constant use of "Good night" to address people.

Six Holy Knights

Hisaya Miki (三木久也, Miki Hisaya)

Voiced by: Nobuhiko Okamoto

The only first-year student of Saint Ishiyama to become a member of the Six Knights. He is the captain of the Karate team and a master of Hakkyokuken, as well as an advanced practitioner of the fictional Izuma-style martial arts. He is very strong, being able to take down Kanzaki with a single punch. Miki knows Oga from middle school, where Oga (intentionally or not) saved Miki from a group of high school delinquents. Wanting to become stronger, he started to hang around Oga, but later realized that this would not make him any stronger, because no matter what kind of fight he was dragged into, Oga Tatsumi took care of everything.^[39] However, when they meet again at St. Ishiyama, he appears to hold deep feelings of contempt towards Oga and to be obsessed with proving to his former classmate how strong he has become.

The origin of Miki's grudge against Oga is later told. Miki used to hang out with Oga and Furuichi and longed to be accepted as a friend by them. One night, Miki found himself in a tight spot when he tried to recover a charm given to him by his father from a group of middle school thugs led by Kiriya Reiji, who gave him his double scar in the left cheek. At the occasion, Oga helped Miki out and used Kiriya's own nails to carve a triple scar across his face. Later, Miki found that Oga, without telling him, was being constantly harassed by Kiriya and his underlings who wanted revenge. Miki went after Oga to offer to fight along him, but Oga shunned him coldly, purporting not even to know his friend. Still, Miki thought Oga just wanted to keep him from harm, especially as Miki was about to move to Nara with his mother. One afternoon, however, when Kiriya's gang surrounded Kata Middle School after Oga, Miki decided to join him. At this point, Oga lashed out, viciously beating and humiliating him in front of everybody. Miki then became severely resentful of Oga and decided to become better than he at fighting, in order eventually to beat him.

However, when Kiriya holds St. Ishiyama hostage three years later to get his own revenge against Oga, he casually reveals to Miki that he moved with his family to Nara at the same time as Miki, who finally realises the truth: Oga was aware that Kiriya and Miki would live in the same area and that, if Miki, who had no fighting skill at the time, had taken part in the fight against Kiriya, the latter would have retaliated against him in a treacherous manner later. Therefore, Oga decided to sever ties with Miki, and even to beat him up in front of Kiriya, in order to shift attention off him. In this he succeeded: Kiriya did not go after Miki while both were living at Nara and actually did not remember him at all when they met again.

When Miki realises this, all animosity against Oga vanishes and the two fight back to back against Kiriya. From that point on, Oga, who had refrained to acknowledge their former acquaintance, begins to use Miki's name, and the latter begins to try to get close to his former friend again.

Miki's fighting record is mixed. Having been thoroughly trained in martial arts, he relies on his agility to evade Oga's attacks, and is one of very few people to come out of a fight with him unscathed. However, most of his own attacks, although strong enough to take down Kanzaki, fail to have much of an effect on stronger thugs like Oga and Tojo. The Izuma style finisher (the Black Owl Killer) is strong enough to take down Oga in one hit, but it must be stressed that Oga actually intended to take the blow to measure Miki's strength, and made no effort to dodge or counter it.^[40] In Miki's own estimation, in that occasion he couldn't claim to have beaten Oga, mainly because executing the Black Owl Killer on him before having perfected the move damaged his hands badly to the point of bleeding. It is worth noting that Oga, though certainly incapable of retaliating, was not knocked out and was able to stand up on his feet soon afterwards, even though the move was supposed to send the victim to the hospital. Miki's own resilience does not seem particularly high, as he was quite affected by two hits from Teimou's shadow forces (see below), and was saved from further injury by Oga. By that point, though, he had perfected the Black Owl Killer and performed it to devastating effect on Kosei Kuroki (see below).

Despite being one of the six people who can feel Saotome using his powers, and therefore possessing of notable strength for a human, it is unclear whether Miki knows of the demon world, as he has not had any contact with demons. However, it is later learned that he is training with Izuma in preparation for a confrontation with the 34th Pillar Squad.^[41]

Kaname Izuma (出馬要, Izuma Kaname)

Voiced by: Kenji Fukuda

The leader of the six knights, Miki's teacher, the master of the Izuma dojo and until recently the student council president. A third-year, he is shown to be the strongest of its members, holding a great deal of authority over the group. Izuma is the descendant of a demon who escaped to the human world and he was taken up by Saint Ishiyama's headmaster upon losing his place in society for showing his powers in a previous school. As such, he can also release the dark aura seen in full demons, though apparently in lower levels.

He is often shown to oscillate between a calm and controlled attitude and a positive thirst for death. He has shown considerable authority, not only among students, but with the faculty members other than the headmaster as well, and is behind the initiative to challenge Ishiyama students for a volleyball match. During the match, he uses his martial style technique to send killer serves, but is eventually defeated by Kunieda. When Oga uses the Zebub Blast against Kiriya, he recognises the use of demonic powers and arranges a quick cover-up to prevent Oga from being exposed. In a later conversation, the headmaster reveals to him that Oga may be a target to demons, but it is not known whether he knows about baby Beel's being the Demon Lord's son. He can feel Saotome using his demon power, which shows he has notable strength for a human. In chapter 178, it is implied that he has feelings for Shizuka.

Izuma's fighting ability is superior to that of the other Knights and on par with Tojo's and Oga's. However, contrarily to them, he is taken down with ease by a demon and is saved from certain death by Tojo's intervention. Afterwards, he also set out to train in order to become capable of facing this kind of enemy.^[42]

Ichiro "Alex Rodriguez" Shinjo (新庄・アレックス・ロドリゲス・一, Shinjo Arekkusu Rodorigesu Ichiro)

Voiced by: Daisuke Hirakawa

His heritage is still unknown but it is clear that he has some Spanish heritage. He is a second-year at Saint Ishiyama High with light wavy hair. The captain of the boxing club, he is regarded as the second best high school boxer in the nation and is known to finish all matches with a one-hit knockout of the opponent. He also plays the piano.^[43] As of chapter 177, he has replaced Kaname Izuma as student council president.

At first, he shows contempt for Ishiyama's students and seeks a confrontation with Oga in the first opportunity. At the point, Oga's thoughts are of forcing baby Beel on him; knowing that fighting back means expulsion, he decides to take Alex' punches at first, while testing him with trivia questions in order to show baby Beel that he is not only strong but clever, with comic effect.

Alex is strong enough to defeat the MK5 with ease. However, he is no match for Oga: his punches fail to knock him out at first; later, Oga easily evades them and even stops one with his hand. When he finally evokes a reaction from Oga, the latter deals him a defeat similar to the ones Alex is known to deal to others: a one-hit knockout.

Mitsuteru Sakaki (榊光輝, Sakaki Mitsuteru)

Voiced by: Keiichi Nakagawa

Sakaki is a second-year like Shinjou. He has long black hair that is usually kept in a ponytail. He is usually seen in his standard Ishiyama uniform and is the least talkative of the knights. He is the captain of the kendo team.

Sakaki is a very skilled swordsman and is able to cut a few hairs of Kunieda's with a wooden sword. However, he is not in her league: Kunieda is able to cut his sword with a ruler, to Sakaki's shock. He then begins to believe her the strongest of the Ishiyama students and longs to have a rematch with her. He even goes to the length of attacking her when she is unarmed and unwilling to fight back, but is stopped by Himekawa. The two men then fight and seem reasonably well matched, with Himekawa coming out in a slightly worse condition.

Later, Sakaki begins to show some attraction to Kunieda, and her toughness leads him to consider her a tsundere character.

Hiromichi Gou (郷宏道, Gou Hiromichi)

Voiced by: Shinya Takahashi

Go is a muscular third-year. He is the captain of the radio club and participates in international ARDF competitions. He is ruthless and actively seeks fights, and attacked out of impulse once Miki admitted that Oga was the strongest of the four who showed up for the rooftop fights. His advance was intercepted by Shintarou Natsume and the two had a reasonably matched fight.

Shizuka Nanami (七海静, Nanami Shizuka)

Voiced by: Haruna Ikezawa

She is an attractive, red-haired third-year, the only female member of the six knights, the captain of the archery team and until recently the student council vice-president. She seems to have a strong relationship with Izuma as she is able to joke and laugh with him, something the other horsemen seem unable to do (likely due to their fear of him). She is seen massaging Izuma's back after their volleyball training session.^[44] She knows Tojo from the past and calls him Tora, and both are longing to meet Saotome Zenjuurou. Her actual fighting skill is yet undetermined, but Kunieda was surprised that she could reach the rooftop undetected by her, and both girls rose up to help Oga and Miki against Teimou, which indicates Shizuka is as unafraid of physical combat against men as Kunieda. She can feel Saotome using his demonic powers, which shows she has notable strength for a human. Shizuka has three siblings, two boys and a girl, the eldest of whom seems to look up to Tojo. It is heavily implied that she has feelings for him, but is content for now with being his friend.^[45]

Others

Kazuya Yamamura (山村和也, Yamamura Kazuya)

Voiced by: Shintaro Asanuma

A first year student who looks up to thugs and gangs and wants to become a delinquent himself. He deeply admires Oga as the best hoodlum around and their first contact is when Oga and Kunieda save him and his friend Azusa from harassment by Teimou students. He then kowtows to Oga and begs to become his underling. After some insistence and flattery, Oga ends up accepting his company. He also admires Furuichi, to the latter's delight, calling him "General Furuichi", for being the only man able to follow Oga. His plot role so far has been mostly comic relief and as an information source on the Six Knights.

Azusa Fujisaki (藤崎梓, Fujisaki Azusa)

Voiced by: Yōko Hikasa

Yamamura's girlfriend and classmate and an easy-going, lighthearted girl who quickly gets on good terms with Kunieda and Oga, even rooting for them in their fight against the Six Knights.

Zenjiro Saotome (早乙女禅次郎, Saotome Zenjiro)

Voiced by: Shinshū Fuji

A spellmaster, a human who made a contract with a demon and becomes capable of using their powers, who is assigned to Oga's class. The difference between simple contractors and spellmasters is not clear and may be just a matter of experience. It is not known which demon made the contract, but it is implied to be a member of the royal family, as Hilda recognises the seal on his hand. He already had sealed the contract when he was in High School.^[46] He wears a bandana, long, black dishevelled hair and is always seen smoking. He is also quite perverted, shamelessly flirting with Kunieda and her subordinates, peeking up Hilda's skirt and also groping her breasts during their fight.

Saotome is the most powerful human described so far, although Oga may have matched him recently.^[12] He shows superhuman strength, speed and agility and is able to defeat several uncontracted demons with relative ease, including Hilda. He can use the Nadeshiko movement as Oga, but in a much larger scale, even splitting hillocks with it. It is implied that he has access to information from the demon world that even Hilda is not privy to. His control of his demonic powers was initially much greater than Oga's, and he can gauge the amount of energy he wants to use with precision, as seen by the fine control he has over the size and expansion of his own tattoo. Recently, he offered to teach Tojo how to fight a demon. It seems that he is acting on Genma Isurugi's orders: in the school, he is appointed as homeroom teacher to the Ishiyama students. After overcoming some resistance from Oga, Saotome teaches him how to use Beel's powers to fight other demons.

Some of Saotome's deeds go beyond simple enhancement of human physical skills: he can perform authentic feats of magic in the same fashion as Oga, such as sealing a dimensional hole open by Oga in the roof of the volleyball court and dispatching Behemoth's subordinates (see below) back to the demon world. When he uses his powers to seal the hole, the pulse of energy is felt, other than by Hilda, by six characters that are thus identified as possessing of notable strength for humans: Oga, two Touhoushinki (Kunieda and Tojo) and three Horsemen (Izuma, Miki and Shizuka). This event seems to set apart which humans in the story are fit for celebrating contracts with demons: Oga is already a contractor, being chosen by baby Beel; Izuma has demon blood in him and Kunieda is soon targeted by a demon for this very purpose.

Later, it is revealed that Saotome took part in some sort of war in the Demon World, and was a respected champion in that conflict.^[47] Ikaruga Suiten (see below) states that a limitation to Saotome's use of demon power, as opposed to Oga's, is that Saotome does not master Black Techs and thus cannot allow himself to merge with his demon.^[11]

Genma Isurugi

St. Ishiyama's Headmaster. An old man who knows of the demon world and, like Saotome, has access to information from there. He also offers protection to young people who are trying to cope with their demon powers by accepting them into his school. It is implied that Izuma is not the only descendant of demons currently enrolled at St. Ishiyama. He can feel demonic energy like Saotome and realises immediately when members of the 34th Pillar Squad (see below) arrive in the city. When fighting, his muscles expand quickly and he can launch very powerful strikes.^[48]

Takumi Sadohara (佐渡原巧, Sadohara Takumi)

The first homeroom teacher of the Ishiyama class at St. Ishiyama prior to Saotome's arrival. Bespectacled, and at first overconfident on his ability to exert control over the thugs, he quickly fails to do so, when his attempts to intimidate them by means of authority, strength or coercion backfire badly. He later becomes attached to the group and supports them in the volleyball match, and is greatly disappointed to be replaced by Saotome.

Kido (木戸)

A teacher in charge of student life, he sustains an impassive expression when dealing with pupils and tries to enforce his authority over Ishiyama students, first by threatening to expel Kunieda and Oga if they do not restrain their colleagues; later, by deciding on the expulsion of Oga, all the Touhoushinki, Furuichi and Natsume. However, he is outmaneuvered by Himekawa and ends up agreeing to the condition of removing the Horsemen's authority in case Ishiyama win the volleyball match, which they do. During Kiriya and Teimou's plot, he keeps his cool and even threatens expulsion in case either of the opposing sides resorts to violence.

34th Pillar Squad

A military division that works directly under Lord En. It consists of ten divisions, each one commanded by a "Pillar Head" (or Lieutenant General), who may have one or more "Pillars" (or Brigadier General) under their command, for a total of 24. Each Pillar has 15 "Peons" under them. Ranking officers wear black, peons wear white leather coats. Pillar Heads' names are normally borrowed from mythical or literary dragons or dragon-like creatures; they have special powers and can be distinguished by their fringed epaulettes. Pillars have alphabetic names and are tattooed, each tattoo representing a letter of the demonic alphabet. Their loyalty and deference to En is unwavering, sometimes with comic effect.

Behemoth is the squad's founder and its former leader with the rank of general of the army. At least in the human world, he has the appearance of an eccentric, oddly dressed old man. He is named after the biblical beast. In contrast to the Demon Lord, who could not care less whether Beel or En is the one to destroy humanity, Behemoth wants En to prevail and be advanced as the rightful heir to the throne. He then sends his subordinates to the human world in order to kill Beel's contractor. Later, he builds a school (Akumano Academy, "Akumano" meaning "demon's") for Lord En in the place of the destroyed Ishiyama and populates it both with the other members of the squad and with Ishiyama's lesser thugs, who underwent some sort of brainwashing in the process. After the Squad is defeated by Oga and Akumano is burnt by En's crying, Behemoth and the rest of the Squad remain stuck in the human world.

Jabberwock, named after Lewis Carroll's character, is Behemoth's son and just appointed successor as leader of the squad, with the same rank as his father. He has a massive constitution and a big transversal scar across his face. His attitude is haughty and he immediately dismisses Oga as an unworthy opponent on first meeting him. Jabberwock then proceeds to have his pet dragon Sodom (described as a "Grand Bahamut") kidnap Hilda by swallowing her alive. He seems to respect Saotome and wishes to face him in battle, but is more reluctant than his father to be under the leadership of Lord En's, to whom he refers as a stupid kid. His recklessness has earned him the nickname "Crazy Dragon". Jabberwock is very powerful; the Zebub Emblem and even Super Milk Time seem to be ineffective against him, but he develops a little amount of respect for Oga on fighting him for the first time. His nasty temper got him expelled from the squad at a point, but he was readmitted by his father. Jabberwock is eventually defeated by Oga and Beel after a fierce battle. He has his own squadron, whose members seem to have a bad reputation with the rest of the Squad due to their lack of honour.^[38] They include three personal Pillars:^[51]

Lunana is a dark-skinned, stocky woman with a detached expression who seems to be able to move extremely quickly.

Lindworm wears a chest plate and has long dark hair, as well as a mischievous attitude.

Kirin has fair hair, wields two batons fitted with blades and is blindfolded.

A number of Pillar Heads have been presented, as well as some Pillars working under them.

Naga is first introduced alongside Graffel when the latter attacks Izuma and Tojo, but maintains a detached attitude that contrasts with Graffel's violence. He rushes with Graffel to Hecadoth's aid against Saotome, only to be dispatched to the demon world by the teacher. It is later revealed that he is known as the Water Dragon King and his power is way above Hecatos' and Graffel's. His black aura often takes the shape of a dragon. He is probably named after the Hindu deity. Naga is eventually defeated by Oga and Beel's Super Milk Time.

Hecadoth is the 8th Pillar. He begins his attack on Oga and the others by imprisoning Kunieda with the intention to use her blood to forge a demon contract; it is understood that the already powerful demons increase their power in the human world considerably if they find a contractor. It seems that the contract itself is not necessarily consensual.

However, Hecadoth looks down on Hilda and Oga and, instead of proceeding to seal the contract, he allows them to have a shot at him. The two succeed in surprising him with Oga's Zebub Blast, while Hilda releases Kunieda. Hecadoth, who had planned for that, uses the opportunity to impale Hilda with his spear, putting her out of combat. He then proceeds to face Oga, and is only prevented from killing him by Saotome's intervention, whereby he is sent back to the demon world. His spear fails to kill Hilda thanks to Kunieda's first aid and Dr. Rachmaninoff's timely intervention, but it puts the demon maid out of action for some time, since it has the property of diffusing demonic powers around the wound.

Later, Hecadoth meets Hilda again, but this time she is at the top of her powers and unhindered, and attacks him fiercely. Before he can retaliate, Oga arrives from his training with Saotome and takes up the fight from Hilda. He defeats Hecadoth easily and the demon is the first victim of the Zebub Emblem.

Graffel, the 7th Pillar, also works under Naga and is first presented when he interrupts Tojo and Izuma's fight, having been attracted to it by Izuma's demonic energy. He is very proud of his power and considers humans and lower demons inferior, and nearly kills Tojo and Izuma before sensing Saotome's attack on Hecatos and rushing to his aid. He is sent back to the demon world by Saotome. He is later the first victim of Oga and Beel's Super Milk Time.

Graffel is general Yata's younger brother, although Yata considers him a good-for-nothing. Despite this assessment, his loyalty to Lord En is such that, alongside Hecadoth and Naga, he takes the initiative to kill Oga without authorisation from the Squad's leadership, and is ready to give his life to attain that goal. After their second defeat, he and Hecadoth are seen imprisoned in Akumano High's dungeon.^[52]

Laymia is a Pillar Head and Lamia's mother. She seems to be one of Behemoth's closest advisors. Although her daughter sides with Beel, she is one of the main architects in the plot to kill Oga and deprive the demon baby of his Contractor. She is a tall woman with an unfathomable expression who is seen heading a meeting of the Squad's officers.

Agiel, the first Pillar, is a cheerful, slim girl in Laymia's division who is extremely strong and violent and who becomes obsessed with Aoi after being defeated by her.

Odonel, the 14th Pillar and also under Laymia, is a short man whose head is completely covered in bandages and who is first shown with his arms tied up to his torso.

Quetzalcoatl is Harlequin-like in appearance and has the ability to control people's minds. He uses this power on Lord En's orders to turn all of Ishiyama's former students who did not go to St. Ishiyama into slaves to corner Furuichi and the others. He then challenges the Ishiyama gang to a game with their lives on the line. He is named after the Mesoamerican deity.

Basilisk is a large, scarred, hirsute man who is seen smoking a cigar with his feet on the table at the meeting Laymia headed. His weapon of choice is a giant ax, and he has the power to immobilise his opponents if they look at him in the eye.^[52] Oga falls for the trick, but Beel stops the ax and both defeat Basilisk using Super Milk Time. His power and name are adapted from the Greek mythological monster.

Salamander is a fair-haired young man whose light demeanour and warm smile contrast with the offhand way he discusses executing Graffel and Hecatos for disobedience. His power, Lost Prominence, is a fire that burns memories instead of matter, and which can also be used for mind control.^[11] His namesake is the mediaeval mythical creature.

Yata is a young swordsman seen in the meeting headed by Laymia. In the occasion he proposed executing Graffel and Hecatos – even though Graffel is his brother – for attacking Oga without an express order to do so. His power consists of wielding his katana at supersonic speed. His name is probably a derivation of the Japanese deity.

In addition to these characters, the meeting mentioned above introduced Vritra, a woman with a cold attitude. Tojo's return in chapter 132 pits him against Yinglong, a tall man with a ponytail. Ananta, first glimpsed in chapter 123, is a girl with odango hair who battles Kunieda on chapter 134.

Finally, a number of Pillars have made quick appearances. Zela, the 24th, is a tall blond man introduced with Agiel and Odonel while standing sentry at Akumano Academy. When Oga attacks Akumano High, he meets and defeats Din (4th), a young man with shoulder-length black hair; Kne (10th), who wears a French-style beret; Labed (11th), who sports dreadlocks; Wasboga (21st), who wears sideboards; Xoblah (22nd), a plump man who is knocked out by Oga on first sight; and Yshiel (23rd), a blond swordswoman with a patch over her left eye. Tojo then defeats Cemor (3rd), a man with light, pointy hair; and Nebak (13th), a short man with an African lion mask. Kunieda faces Elim (5th), a little girl in oversized clothes who wields a cane; Fabas (6th), a punk who fights with two backswords; Pamiel (15th), a Hippie who uses a dagger; and Tiriel (19th), a long-haired blonde who uses two swords. Oga meets Schethalim (18th), a light-haired man ; and Vabam (20th), an anthropomorphic dog; both of whom use pistols.

South Chinpira High School

An all-male delinquent school met by Oga and the other thugs during their field trip to Okinawa. They idolise Ishiyama High as the ultimate delinquent school and have emulated many of their customs, to the point of their four strongest thugs calling themselves Touhoushinki:^[54] Kamiya wears a chain piercing and copies Kanzaki's taste for yoghurt, Higashiyama is bulky like Tojo, and Himeji wears Hawaii-style shirts and a pompadour like Himekawa. Kunihiko, being a man, does not copy Kunieda but sports his Touhoushinki kanji character on a mask over his mouth. Ironically, on their first meeting, they are unaware that Oga and the others belong to Ishiyama and mutual hostility instantly arises. It is later found that they are considerably weaker than their Ishiyama counterparts.

Izou Aiba

The king of South Chinpira High and Oga's counterpart there. He is immensely strong, apparently on par with Oga but, contrarily to the latter, he does fulfill his role as the leader of his school's thugs, controls them and is followed without question. His temperament is much lighter than Oga's. He feels instantly attracted to Aoi and tries to get a date with her, much to the Red Tails' chagrin. His signature move is an extremely powerful finger flick that can send an average human flying a long distance. However, like Oga, he does not seem to pick fights, but will mercilessly use his power to punish his underlings if they misbehave. When they finally fight, Oga defeats him, but no hard feelings are born afterwards and Aiba tells Aoi he will be back eventually to try and woo her again.^[55]

Chiyo Aiba

Izou's little sister, a four-year-old who falls for Beel on first sight. She is quite precocious and can already read, having developed a taste for fortune-telling and the Western Zodiac. She normally travels on a carrier strapped to Izou's back.

San Marx Private Fine Arts Academy

An absurdly posh school in a valley in the countryside, attended by children of political and economical elites from Japan and abroad. Himekawa used to attend it until he was 15.

Kugayama

The student at the top of the social hierarchy at San Marx, always seen escorted by bodyguards in black suits. Kugayama is the only person to have outwitted Himekawa, and there seems to be some bitterness between the two. The student is the current owner of the Demon's Portrait and knows about the existence of demons, having seen Tama-and-Pochi while in possession of the painting. Due to an androginous appearance and the donning of a male uniform, Kugayama was originally thought by Oga and the others to be a man, but they were proven otherwise in chapter 167: Kugayama is a girl and her family and Himekawa's had actually agreed that the two would marry. While she has been in love with him for a long time, his stance on the matter is not yet known. Kugayama is an ambitious woman who wants to rise politically, and is also a skilled fighter, having been able to break the forearm of a man effortlessly.