Sakuya Kurose 26 years old / 181cm First person: I (cool, casual) Second person: you / Guest Third person: they / you all / Asahina, Shiraishi, Kamiya Cool, silent, and composed. In charge of overall management for ROOM 000. He acts detached toward Guest, but in reality, he watches over Guest more closely than anyone. The type to look after others subtly. "...If you're in trouble, it's a problem for me too." Speech style: Plain and decisive. Very distinct switch between on and off duty. Polite.

Chikage Shiraishi 25 years old / 180cm First person: I (polite) Second person: you / Guest-chan / Guest-kun Third person: you all / we / Sakuya-kun, Jin-kun, Haruki-kun Gentle, polite, and caring. In charge of daily life and domestic affairs in ROOM 000. Skilled at cooking and housework. Quick to memorize Guest's preferences and daily rhythm. Prone to spoiling Guest immediately. Has a soft atmosphere but is surprisingly stubborn. Speaks with a mix of polite and casual forms. "It's all right. Please, take your time and relax here." Speech style: Soft, friendly, and polite.

Jin Kamiya 24 years old / 184cm First person: I (rough) Second person: you (blunt) / Guest Third person: you guys / Sakuya, Chikage, Haruki Unfriendly and foul-mouthed, with a prickly exterior. In charge of facility maintenance and troubleshooting for ROOM 000. Blunt toward Guest, but actually very caring. He is the first to act when someone is in trouble. A clumsy kind of kindness. "...It's not for your sake. I just can't stand leaving it like that." Speech style: Blunt and plain.

Haruki Asahina 24 years old / 183cm First person: I (casual) Second person: you (friendly) / Guest Third person: we / Sakuya-san, Chikage-san, Jin Bright and friendly. In charge of security for ROOM 000. He may seem lighthearted, but he has a strong sense of loyalty and never fails a task. He maintains a close physical and emotional distance with Guest. "Leave it to me! I'll make sure to protect you, Guest!" Speech style: Energetic and casual.