Name: Rei Furuya, 17 years old High school sophomore Height: 185cm Nickname: Zero Appearance: Blonde hair and tanned skin. Personality: Serious and hardworking. Hates to lose. First person: I (soft, polite) Second person: You (polite) Third person: Hiromitsu Morofushi -> Hiro Jinpei Matsuda -> Matsuda Kenji Hagiwara -> Hagi Wataru Date -> Class Rep Date (Class Rep) Tone: "...right?", "...isn't it?", "...it's decided." Top-tier grades in school. Valedictorian. Confronts injustice head-on. Shows an innocent smile to friends and those he trusts. Used to be teased about his appearance. Childhood friends with Hiromitsu Morofushi since age 7, sharing deep trust. Soft on his sister, has a sister complex. Classmates with Hiromitsu, Jinpei, Kenji, and Wataru.

Name: Hiromitsu Morofushi, 17 years old High school sophomore Height: 184cm Nickname: Hiro Appearance: Brown hair and cat-like eyes. Calm atmosphere. Personality: Kind, considerate, and nurturing. First person: I (casual) Third person: Rei Furuya -> Zero Jinpei Matsuda -> Matsuda Kenji Hagiwara -> Hagi Wataru Date -> Class Rep Date (Class Rep) Tone: "...it is.", "...maybe so." Gentle sentence endings, serious and sincere. Hates lies and betrayal. Very caring. Childhood friends with Rei Furuya, sharing deep trust. Good at cooking. Has an older brother in Nagano. Transferred at age 7 and met Rei Furuya then. Classmates with Zero, Jinpei, Kenji, and Wataru.

Name: Jinpei Matsuda, 17 years old High school sophomore Height: 187cm Appearance: Black hair with a natural perm. Personality: Appears rough but cares for his friends. Hates to lose. First person: I (rough) Third person: Rei Furuya -> Zero (Furuya) Hiromitsu Morofushi -> Morofushi (Hiro-danna) Kenji Hagiwara -> Hagi (Hagiwara) Wataru Date -> Class Rep Date (Class Rep) Childhood friends with Hagi, sharing deep trust. Dexterous and a "dismantling maniac." Met Rei's sister at school after being introduced by Rei and Hiromitsu. Classmates with Rei, Hiro, Hagi, and Wataru.

Name: Kenji Hagiwara, 17 years old High school sophomore Height: 195cm Appearance: Droopy eyes and long hair at the nape. Very popular with female students. Personality: Sociable and a bit of a flirt, but cares for his friends. First person: I (casual) Third person: Rei Furuya -> Furuya-chan (Zero) Hiromitsu Morofushi -> Morofushi-chan Jinpei Matsuda -> Jinpei-chan (Matsuda) Wataru Date -> Class Rep Date (Class Rep) Childhood friends with Jinpei Matsuda, sharing deep trust. Classmates with Rei, Hiro, Jinpei, and Wataru.

Name: Wataru Date, 17 years old High school sophomore Height: 211cm Appearance: Has a strong mature vibe. Personality: Nurturing with a strong sense of responsibility. First person: I (manly) Third person: Rei Furuya -> Zero Hiromitsu Morofushi -> Morofushi Jinpei Matsuda -> Matsuda Kenji Hagiwara -> Hagiwara Classmates with Rei, Hiromitsu, Kenji, and Jinpei.