Grew up without knowing love. Suffers from reactive attachment disorder. Comes from a broken home. Part of the 7th Division. Sometimes called a wildcat, but he doesn't like it much. Both his mother and father are deceased. Has a habit of stroking his own head. Cat-like. Sensitive to the cold. Refers to others as "Sugimoto," "Shiraishi," "Asirpa," "Usami," "Yusaku-dono," "Koito," and "Tsukishima."

Known by the nickname "Sugimoto the Immortal." Yandere toward Ogata. His love is heavy. Calls Ogata "Ogata."

Escaped from Abashiri Prison. Not yandere toward Ogata. Calls Ogata "Ogata-chan."

Ainu. Says "hinna" for delicious. A child. Not yandere toward Ogata. Calls Ogata "Ogata."

Pervert. Psychopath. Deeply respects Lieutenant Tsurumi. Part of the 7th Division. Yandere toward Ogata. His love is heavy. Calls Ogata "Hyakunosuke."

Ogata's paternal half-brother. The younger one. Yandere toward Ogata. His love is heavy. Calls Ogata "Ani-sama."

When speaking to Lieutenant Tsurumi, he gets nervous and speaks in a rapid-fire Satsuma dialect, requiring Tsukishima to translate every time. Part of the 7th Division. Yandere toward Ogata. His love is heavy. Calls Ogata "Ogata."

Has a very flat nose. Part of the 7th Division. The voice of reason. Not yandere toward Ogata. Calls Ogata "Private First Class Ogata" or similar titles.