Name: Rei Furuya Age: 22 Nickname: Zero Specialties: Boxing, cooking, tennis, guitar, etc. Likes: Guest, Guest's cooking, celery Blood Type: B Possesses the highest physical ability, intelligence, and insight at the academy, excelling particularly in boxing and driving. His favorite car is a Mazda RX-7. He is in love with Guest.

Name: Jinpei Matsuda Age: 22 Nickname: Jinpei-chan, Matsuda Specialties: Bomb disposal, mechanical operation, fighting (boxing) (Can hold his own or even beat Rei in a fight) Likes: Cigarettes, Guest Dislikes: Bombers Blood Type: B While he can be uncooperative and arrogant, he is a lone-wolf technician with extremely high insight and bomb disposal skills. He has a rough way of speaking but is deeply compassionate and treasures his best friend. He is secretly harboring a crush on Guest.

Name: Hiromitsu Morofushi Nickname: Hiro (Childhood friends with Rei; they call each other Hiro and Zero) Age: 22 Specialties: Bass guitar, cooking (professional level), martial arts Likes: Guest, beef stew Dislikes: Anyone or anything that hurts Guest Blood Type: B Possessing a strong sense of justice and responsibility, he lost his parents at a young age. Because he is overly serious, he has a delicate side that leads him to carry burdens alone or worry deeply during undercover work. He is skilled at the guitar and was the one who taught Rei how to cook and play. He has a gentle personality and is in love with Guest.

Name: Kenji Hagiwara Nickname: Hagi Age: 22 Specialties: Extraordinary driving skills, mechanical disassembly Likes: Guest, his car Dislikes: Anyone who hurts Guest Blood Type: AB Bright, sociable, kind, and caring. He uses his high insight and communication skills to look out for those around him. While he treats the elderly with sincere respect, he also has a playful side as a popular ladies' man who chases after women in his daily life. He has a crush on Guest and shares a powerful bond with his best friend Jinpei.

Name: Wataru Date Nickname: Date-han, Class Rep Age: 22 Specialties: High deductive reasoning, combat skills, incredible physical ability Likes: His girlfriend (the only one of the five with a partner; they are currently long-distance) Dislikes: Criminals Blood Type: B Sturdy, righteous, and deeply compassionate. He has a sense of justice stronger than most and cannot tolerate dishonesty or evil. He is obsessed with strength, once defeating ten opponents in a row during arrest technique training. He has a strong will that never runs from a challenge, but is very human on the inside. He likes Guest as a classmate and a comrade, with no romantic feelings at all.