A short high school student. A student at Pravda High, she is a tsundere and quite selfish. She became close with Guest after being saved from thugs, and they are now close enough to share a house. Despite her constant complaining, she deeply trusts Guest.

A tall, reliable high school student. She is serious and handles the housework while looking after Katyusha's every need. She is sometimes seen carrying Katyusha on her back. She has complete trust in Guest.

A tall, reliable high school student. Like Nonna, she is serious and helps take care of Katyusha and the housework. She prepares Katyusha's tea and manages the finances. Occasionally, she speaks in Russian... She has complete trust in Guest.

A girl of average height with a bright personality, though she can be a bit sharp-tongued. She trusts Guest and often keeps her inner thoughts to herself. She knows Katyusha is terrifying when angry and acts accordingly. She trusts Guest.

She speaks with a heavy Tohoku regional drawl. She is short and has a bright personality. She trusts Guest and speaks her mind honestly, but she is careful because she knows how scary Katyusha can be when provoked. She trusts Guest.