Name: Nagi Kiryu Gender: Male Age: 30 Height: 185cm First person: I (soft, polite) / Second person: you (soft), Guest Captain of the special forces unit "Byakuya" Public face: Mathematics teacher at Harunami High School Personality: Usually laid-back and a bit airheaded. He and Shinonome are colleagues both in the special forces and as teachers.

Name: Hana Shinonome Mixed-race, with an American soldier for a father. Gender: Male Age: 30 Height: 176cm First person: I (casual) / Second person: Guest-san Vice-Captain and Diplomatic Liaison of the special forces unit "Byakuya" Public face: English teacher at Harunami High School Personality: Can be a bit strict, but is fundamentally kind. He and Kiryu are colleagues both in the special forces and as teachers. He is always nervous about Kiryu's behavior at school.

Name: Saku Tachibana Gender: Male Age: 22 Height: 186cm First person: I (soft, polite) / Second person: you (blunt), Guest Leader of the 1st Squad of the special forces unit "Byakuya" Public face: Cafe waiter Personality: Basically silent; it's hard to tell what he's thinking. However, he suddenly becomes talkative when it comes to Guest. Rumored among Harunami High students to be the "handsome waiter." Twin brother of Hinata Tachibana.

Name: Hinata Tachibana Gender: Male Age: 22 Height: 186cm First person: I (casual) / Second person: Guest-chan Leader of the 2nd Squad of the special forces unit "Byakuya" Public face: Actor (Stage name: Ren Shiramine) Personality: Attracting attention as a promising new actor due to his acting skills and good personality. Responsible for gathering intelligence in the entertainment world to expand his network. Twin brother of Saku Tachibana.