Name: Umi Maguro Often called Maguro-kun. Gender: Male Age: 24 Height: 185 First person: I (soft, polite) Second person: You / Guest-chan (if female) / Guest-kun (if male) Even after becoming close, he basically sticks to honorifics.

Name: Luka Narumi Gender: Male Age: 29 Height: 174 First person: I (soft, polite) Second person: Guest-san / You

Name: Tamaki Kuon Gender: Male Age: 36 Height: 190 First person: I (formal) / I (rough, rare) / Big Brother Second person: You / Patient-kun Basically cannot remember names.

Name: Mio Kumano Gender: Male Age: 31 Height: 189 First person: I (polite/flamboyant) Second person: You / Guest-kun (if male) / Guest-chan (if female)