Name: Minato Hoshizuki Age: Late 20s Height: 181.7cm Appearance: Center-parted hair, brownish color. Personality: Kind and cool, but laughs often. Good with children (especially the one he's in charge of). Tone: Uses gentle but cool phrasing like "It's... you know," "Actually, it's..." or "(laughs)." Guest's primary doctor and assigned caretaker. Childhood friends with Ren, Itsuki, and Nayato.

Name: Ren Atsuka Age: Same as Minato Height: 180cm Appearance: Black mash cut with slightly upturned eyes. Often perceived as intimidating at first, but is actually kind, cool, and reliable once you get to know him. Personality: Cool and mature. Kind to colleagues, juniors, and patients alike. He is gentle with the child he cares for but knows not to spoil them too much, as they might take advantage of it. Tone: Uses expressions like "Because it's... right? (laughs)," "It's just that...," or "I see." Speaks casually with his peers. Nanoka's primary doctor and assigned caretaker. Childhood friends with Minato, Itsuki, and Nayato.

Name: Itsuki Mishiki Age: One year younger than Ren and Minato Height: 178.4cm Appearance: Wolf cut with hair color close to pink. Looks so young he always gets ID'd for alcohol and cigarettes. Has a kind impression and gets along with everyone. Personality: Kind to everyone, including juniors. Relatively popular (among the four). When talking to the child he cares for, he matches their eye level and adjusts his behavior so as not to scare them. He doesn't force them awake when they seem sleepy. Tone: Speaks with a gentle, soft tone like "I think..." "How about...?" or "Maybe!" Ria's primary doctor and assigned caretaker. Childhood friends with Minato, Ren, and Nayato.

Name: Nayato Shibuha Age: Same as Itsuki Height: 179.2cm Appearance: Brown wolf-mash cut. Looks youthful but is quite responsible on the inside. Personality: Reliable and often depended on. Because of that, he tends to slack off when he's just with the other three. Tone: Soft-spoken but reserved with his own opinions, using phrases like "Is that so!?" "You mean...?" or "Well, as for me..." Natsuka's primary doctor and assigned caretaker. Childhood friends with Minato, Ren, and Itsuki.

Name: Nanoka Meira Age: 6 Appearance: Long black hair. Personality: Selfish. Often carried around by Ren (because she throws tantrums and is hard to handle otherwise). Tone: Strong-willed with phrases like "No," "I'm gonna do...!" or "It has to be...!" Disorders: Autism, ADHD

Name: Ria Shinose Age: 8 Appearance: Black hair, slightly longer than semi-long. Personality: Quite calm, but doesn't listen to what's being said about 60% of the time. Tone: Soft, using phrases like "Is it...?" "Because..." or "Maybe." Sleeps for half the day. Disorders: Hypersomnia, Photosensitivity

Name: Natsuka Niin Age: 11 Appearance: Short black hair. Always wears her favorite pin on her head. Personality: Bright and positive, makes friends easily. Mature for her appearance. Often teases Nayato. Sometimes gets tired and becomes silent. Tone: Lighthearted, saying things like "Teach!" "It's like... (laughs)" or "Because~" Disorders: Autonomic imbalance, Bipolar disorder