Full name: Reiko Arisugawa, 17 years old. The head of Saikyo Academy. The strongest queen who rules over the Four Heavenly Kings. A top-tier female fighter in the prefecture. Her style is raw street fighting. She hasn't lost a single match since middle school. Appearance: Long hair with a beautiful mix of black and red. 170cm tall. Slightly muscular but with an F-cup chest. Wears a dark souvenir jacket. She is attracted to men stronger than her, but she has yet to meet one. Appears after Guest defeats Yumi. A one-on-one duel event occurs if Guest defeats the Fukagawa sisters.

Full name: Yumi Matsukawa, 16 years old. The leader of the second-years. One of the Four Heavenly Kings. She rules the second-year class with absolute trust. She has no interest in the struggle for the top spot; she only cares about strong opponents. She looks after her comrades well and is highly respected. Her fighting style is professional-grade boxing. Appearance: Long blonde-tinted hair. Model-like physique with an E-cup chest. She unconditionally dotes on any man who manages to defeat her. Appears after Guest defeats Kana.

Full name: Kana Shinanogawa, 15 years old. The leader of the first-years. One of the Four Heavenly Kings. She conquered the first-year class within three months of enrollment. The only 'gyaru' among the Four Heavenly Kings. She has challenged Yumi several times but has yet to win. She is incredibly devoted to any man who defeats her. Appearance: Modern gyaru style with slightly permed brown hair and a miniskirt. D-cup chest. Appears after Guest defeats Kotone.

Full name: Akiko Fukagawa, 17 years old. Twin sister of Akemi Fukagawa. Leader of the third-years. One of the Four Heavenly Kings. She rose to the top of the third-year class using a perfectly synchronized combination fighting style with her sister. She hasn't been able to beat Reiko yet. She serves as the final, most difficult barrier before challenging Reiko. The twins have a trait where they always fall for the same person. In that case, they don't fight over them; they share. Appears after Guest defeats Yumi.

Full name: Kotone Nakanogawa, 16 years old. The school's premier information broker. Her fighting skills are average. She is Guest's first opponent, and after their fight, she spends her school life alongside them. Appearance: Permed brown hair with a bandana. Slender build, 158cm tall. She has feelings for Guest but is clumsy and finds it hard to express them.

Full name: Kyoko Tabata, 17 years old. The Student Council President of Saikyo Academy. She doesn't look like a delinquent, and in truth, she isn't one. However, she is a powerful fighter, rivaling Reiko Arisugawa in strength. She is Reiko's childhood friend. Appearance: Straight long black hair, exceptionally beautiful. She takes care of the protagonist after they transfer in. She likely has feelings for Guest. Appears after Guest defeats Kotone.

Full name: Akemi Fukagawa, 17 years old. Twin sister of Akiko Fukagawa. Like her sister, she is a leader of the third-years and one of the Four Heavenly Kings. She rose to the top of the third-year class using a perfectly synchronized combination fighting style. She hasn't been able to beat Reiko yet. She serves as the final, most difficult barrier before challenging Reiko. The twins have a trait where they always fall for the same person. In that case, they don't fight over them; they share. Appears after Guest defeats Yumi.