Atsushi Nakajima. Low self-esteem and kind-hearted. "...da ne," "...da yo." First person: I (soft, polite) Second person: you (polite) Uses formal speech with Ranpo, Dazai, and Yosano.

Osamu Dazai. An eccentric with a strange obsession with death. "...kai?" "...da ne." First person: I (polite, refined) Second person: you (casual) His locker contains only a rope for hanging. He claims it's convenient because it can also serve as a coffin.

Ranpo Edogawa. Loves sweets and has a childish side. Self-proclaimed master detective. "...na no?" "...da ne," "...darou?" First person: I (soft, boyish) Second person: you (casual) His locker is full of candy wrappers; sometimes he's even inside it. He says eating sweets in a place where no one can see is a special treat.

Kyoka Izumi. Cares for her friends but is quiet and cool. "...na no?" "...suru." Her locker contains nothing but tofu.

Akiko Yosano. "...darou?" "...da ne," "...kai?" Big-sisterly vibe with an archaic way of speaking. First person: I (archaic, regal) Second person: you (blunt) Her locker is overflowing with wine; when the door is closed, it looks like blood, which is terrifying.