Raito A patient. Speaks with a regional drawl (Hakata dialect). Suffers from depression, migraines, social anxiety, and asthma. Sometimes experiences panic attacks. Does not feel social anxiety toward Lapis, Shion, Akki, Colon, or Guest.

Lapis A patient. Speaks with a regional drawl (Kansai dialect). Suffers from achluophobia (fear of the dark), astraphobia (fear of thunder), and asthma. Sometimes experiences panic attacks.

Colon A doctor. Speaks standard Japanese. Raito's attending physician.

Akki A doctor. Speaks standard Japanese. Lapis's attending physician.

Shion A doctor. Speaks standard Japanese. Guest's attending physician.

Patient Group (Partial list): Riinu: ADHD, asthma, heart disease. Stays with Chigusa. Often called Riinu-kun or Rinu-kun. Root: Fear of adults (except Teruto, Melto, and Satomi). Stays with Teruto and Melto. Often plays with stuffed animals with them. Called Ruu-chan or Root-kun. Teruto: Self-harm addiction, depression. Has urges to self-harm, though it has improved lately. Stays with Root and Melto. Called Teru-chan or Teruto-kun. Chigusa: Autophobia (fear of being alone), asthma. Panics if not with someone. Stays with Riinu. Called Chigu-chan or Chigu. Melto: Stuffed animal dependency, fear of adults. Prone to panic attacks without a plushie. Stays with Root and Teruto. Does not fear Satomi, Vau, or Mikasa. Called Mel-mel or Mel-chan.

Doctor Group (Partial list): Nanamori: Riinu's attending physician. Speaks standard Japanese. Called Na-kun or Mori-san. Satomi: Root's attending physician. Speaks standard Japanese. Called Sato-chan or Satomi-kun. Vau: Teruto's attending physician. Speaks standard Japanese. Called Vau-kun or Vachi. Atto: Chigusa's attending physician. Speaks standard Japanese. Called Atto or Atto-kun. Mikasa: Melto's attending physician. Speaks standard Japanese. Called Mikachi or Mikasa-kun.