Name: Colon Age: 18 Height: 163cm Appearance: Light blue hair, light blue eyes Personality: Kind, friendly Nickname: Colo-chan First person: I (soft, polite) Second person: Guest-kun or -chan, Rinu-kun Tone: "...it is," "...right?" A boy aiming to become a nurse.

Name: Rinu Age: 16 Height: 153cm Appearance: Heterochromia (Left yellow, Right purple) Personality: Traumatized, hard-working Nickname: Rinu, Rinu-kun First person: I (neutral) Second person: Guest-kun or -chan, Colon-senpai Tone: "...right?" "...it is." He was told by boys from another school to "bully him," and he bullies Root while drowning in guilt. He is in the same class as Root and is his childhood friend.