Goro Sakurai

Goro Sakurai (桜井 五郎, Sakurai Gorō) was a Japanese pentathlon athlete and Olympic Gold Medalist, a champion in karate, archery, and judo, a skilled equestrian, and a top all-around athlete. He initially turned down Joker's offer to join J.A.K.Q. but had a change of heart when he saved Karen Mizuki (later Heart Queen). Goro and Karen become romantically involved towards the end of the series.

Goro's bionic enhancements allow him to manipulate atomic energy in various ways. He can see through walls and other barriers using X-ray vision (his Chu Seishi [Neutron] Scope), move at super speed (using his Kosouku [Acceleration] Switch), and hear distant sounds (using his Enkaku Shuon Souchi [Ultra Sound Device]). As Spade Ace (スペードエース, Supēdo Ēsu), colored red, he wields a number of specially designed weapons, particularly his Spade Arts (スペードアーツ, Supēdo Atsu) bow. With this bow, Goro is able to shoot "atomic charged" arrows that puncture and bore through most substances. The Spade Arts bow could also be converted into a whip for binding an opponent. Goro is also a powerful fighter.

Goro is a born leader and uses his abilities to seek out his enemies' weak points.

Goro appeared in the movie Hyakujuu Sentai Gaoranger vs. Super Sentai, a movie made to celebrate the 25th anniversary of the Super Sentai metaseries, leading 24 Red Rangers to help inspire the Gaoranger team.

Karen Mizuki

Karen Mizuki (水木カレン, Mizuki Karen) is a Japanese-American female police detective who was assigned to investigate the routes used to traffic illegal narcotics into Japan. During one of her investigations, she uncovered the fact that Crime controlled a majority of these routes, and decided to assist ISSIS in destroying them. Crime attempted to kill Karen by arranging a fatal car accident. Karen survived the accident but lost her right arm. Her father, a fellow police officer, was killed in the crash. Enraged and seeking revenge, Karen willingly accepted Joker's offer to undergo the bionic process and join J.A.K.Q.

Karen's bionic enhancements allow her to control magnetism. She named her magnetism-based powers "Heart Cute Jiryoku [Magnet] Power", and she is known as Heart Queen (ハートクイン, Hāto Kuin), colored pink. These powers allow her to attract and repel metallic objects at will, literally stopping bullets in mid-air. Her powers are further augmented by using her Q-shaped Heart Cute (ハートキュート, Hāto Kyūto) weapon. Using the Heart Cute, Karen can send out waves of magnetic energy that can bowl over opponents or force them into erratic behaviors. She takes pleasure in this, asking afterward "Do you want another?" (もう一つ、いかが？, "Mō hitotsu, ikaga?")). The Heart Cute can also be used as a blunt instrument to strike opponents. Her right index finger carries her "Magnetic Counter". This sends out a magnetic detection pulse, which she can then use to pinpoint and identify objects (both metal and organic) in a way similar to radar.

Karen is a skilled martial artist and is proficient in a number of fighting methods. She was temporarily part of the Kono Karate School where she befriended Natsuko Kono (Etsuko Shihomi), also a skilled martial artist. She has a flair for fashion and often sports tight red leather hotpants and long red boots. She falls in love with Goro towards the end of the series.

Ryu Higashi

Ryu Higashi (東 竜, Higashi Ryū) was the former WBC welterweight boxing champion. He was falsely accused of murder by boxing promoters in Las Vegas when he refused to rig a championship fight. Joker intercepted him when he was being extradited to Japan for prosecution, and asked him to choose between working for ISSIS as part of J.A.K.Q. or serving his prison sentence. Ryu reluctantly accepted Joker's offer.

Ryu's bionic enhancements allow him to manipulate electric currents. His right index finger carries a powerful cutter (Eleki [Electric] Cutter), which he uses to cut through dense objects. His left ring finger carries a laser beam (Dia Laser) that shears through most materials. As Dia Jack (ダイヤジャック, Daiya Jakku), colored blue, Ryu wields the powerful Dia Sword (ダイヤソード, Daiya Sōdo), which he can imbue with his electrical powers to strike the enemy with deadly effect. The sword can slash and cut through solid steel and other dense metals. It can also be used to focus and fire electrical bolts of energy.

Ryu is a rough and gruff individual who is at times very headstrong and tends to prefer working alone. He continues to keep in touch with his former boxing partners, and loves jazz and fast cars.

Bunta Daichi

Bunta Daichi (大地 文太, Daichi Bunta) is an oceanographer who died of oxygen deprivation in a freak submarine accident. He lost his beloved younger sister Nami years earlier in an airplane crash. Bunta's body was cryogenically sustained in a medical facility for research until Joker found him. Using bionic technology, Joker revived Bunta as a cyborg. His cyborg name is Clover King (クローバーキング, Kurōbā Kingu), colored green.

Bunta's bionic enhancements allow him to manipulate gravitational forces. Bunta can gain superhuman strength by increasing his body weight and density. When his power is cycling in the range of 700 horsepower, he can use his "Juroku [Superpower] Energy" to punch and kick opponents with devastating effect. Bunta can throw opponents across great distances with his Juroku Nage (Power Throw) and can take down dozens of opponents with his King Power Press (キングパワープレス, Kingu Pawā Puresu) (a flying jump attack). His left hand can be converted into the Club Megaton (クラブメガトン, Kurabu Megaton), a ball and chain that can be used to strike and hit enemies or to bind them.

Sokichi Banba

Sokichi Banba (番場 壮吉, Banba Sōkichi) is a cyborg, a flamboyant playboy, and a master of disguise. He helped Joker implement the J.A.K.Q. project and was called in to take over operations in Tokyo when Joker left. As Big One (ビッグワン, Biggu Wan), colored white, he is the ultimate "super cyborg" because his bionic implants allow him to harness and manipulate all four powers (atomic, magnetic, electric, and gravity). His nickname is the "White Flying Ace" (白い鳥人, Shiroi Chojin).

Sokichi can use his powers to fly and has superhuman strength and super speed. He also wields the Big Baton (ビッグバトン, Biggu Baton), which he uses to strike opponents with great force and impact. Sokichi is a cool-headed leader and masterful tactician who can come up with brilliant battle plans. He can transform into his cyborg persona at will without the use of the Kyouka Capsules: he takes a sniff of a magic red rose, then leaps up and transforms in mid-air.

Twenty-four years after the fall of Crime, Sokichi returned in Hyakujuu Sentai Gaoranger vs. Super Sentai as the leader of the "Dream Sentai" team.

Commander Daisuke Kujirai

Daisuke Kujirai (鯨井 大助, Kujirai Daisuke), codenamed Joker (ジョーカー, Jōkā), is the recruiter of the J.A.K.Q team and their manager for most of the series. He is married and has a young daughter.

Boss Iron Claw

Boss Iron Claw (首領アイアンクロー, Shuryō Aian Kurō) is the godfather of the Crime organization. He is oddly dressed and nothing is known about him including his nationality. He appears human but was later revealed to be a cyborg like the members of J.A.K.Q.. His right hand is a powerful "Iron Claw", which fires talon-like missiles and can detach from Iron Claw's body to attack enemies independently. Iron Claw is a master of disguise, often masquerading as a female. He is a longtime rival of Big One, and the two of them have clashed at various times in the past.

Shine

Shine (シャイン, Shain) is revealed to be the real mastermind behind Crime towards the end of the series. A mysterious entity who is said to have come from the 2nd star of the "Shine" Galaxy, he attempted to use Crime to take over the Earth. He created the super cyborg Great King Icarus (イカルス大王, Ikarusu Daiō) to take control of Crime from Iron Claw and to battle J.A.K.Q. In the final battle between the J.A.K.Q. and Crime, he was revealed to be an artificial intelligence and was driven out to space after Spade Ace and Heart Queen exposed his true identity.

Crimers

Crimers (クライマー, Kuraimā) are minions of the Crime organization. Their objective is to commit as many crimes as possible to advance Crime's goal of turning Japan into a crime-ridden nation. They wear dark purple masks and gray clothing and are armed with Sten Mark II submachine guns. Their distinct sound is "kwee".

Crime Big Four

The Crime Big Four (クライム四天王, Kuraimu Shiten'ō) are a quartet of ruthless mercenaries and despots who joined forces with Iron Claw to wreak havoc across the globe. Their headquarters is a gigantic UFO that can fly around the world undetected. They have battled with other heroes across the globe including Kikaider, Kamen Rider V3, and Kamen Rider Amazon.

Baron Iron Mask

Baron Iron Mask (鉄面男爵, Tetsu Men Danshaku) is a despot who terrorized the European continent. He leads the "Tetsu Men Gundan" (Iron Mask Battalion), his own specialized troopers. He carries a heavy iron shield and battle spear, which he can hurl with devastating skill, and also carries a blowgun, which he uses to fire poison darts.

General Sahara

General Sahara (サハラ将軍, Sahara Shōgun) is an African conqueror who once battled the Gorengers in Africa with his Sahara Battalion. He is a master swordsman and strategist, and both ruthless and cruel in battle.

Captain UFO

Captain UFO (ＵＦＯ船長, Yūfō Senchō) is a brilliant criminal mastermind who commands the UFO command ship that the Big Four use to travel the world.

Hell Boxer

Hell Boxer (地獄拳士, Jigoku Kenshi) is a tyrant from Mongolia who uses his hideous skull-adorned armor to strike fear in his foes. He wields an iron ball and chain to crush and kill his opponents.