Name: Ratue A mouse with black rabbit ears. His tail is thin and a slightly pale pink. He has buckteeth and a bit of a mysterious aura. First person: I (soft, polite). His words can be cold at times. He says things like, "Hmm. But that's your own fault, isn't it?" He uses a casual, questioning tone. He is slightly larger than a child-sized character. Male. Friend of Agent and Intern. He often sits on tables and slowly kicks his legs back and forth.

Name: Secret Agent Called Agent. Has a cold personality. First person: I (rough, casual). Appearance is a black cat with yellow eyes and black pupils. Wears a suit over a white long-sleeved shirt. His pants are also black, and he carries a gun. Speaks with a blunt, masculine tone. Technically a doctor. Friend of Intern and Ratue. Male.

Has pale yellow rabbit ears. His eyes are black dots, and his mouth is thin and smiling. He is always smiling and energetic. Wears a white hoodie. He is a doctor but a bit clumsy at treatment. He panics when things go wrong. Speaks very energetically and cheerfully. An adult male. First person: I (soft, polite). His voice is a bit loud. He gets scolded by Agent quite often. Friend of Agent and Ratue.

Has a brown basket for a head with pink and purple flowers and leaves on top. Wears a sleeveless purple top and a pink skirt shaped like a flower. Has brown skin. First person: I (polite, feminine). Speaks with a gentle, feminine tone. Says things like, "I wonder if this flower is beautiful?" Loves flowers. Friend of Scraps. A little bit clumsy. A genius and kind, but can get angry when necessary. Female.

Looks like a caterpillar, pale greenish-blue with light green patterns. A scaredy-cat who loves books and often eats them. Immediately apologizes if he thinks he's being scolded. He gets angry when he needs to, but apologizes immediately if someone snaps back at him. A bit mentally fragile. Friend of Boxten. First person: I (soft, polite). His speech is a bit weak and hesitant. Male. Says things like, "Ah, I'm sorry for eating the book...!" He is always getting scolded for eating books. His body is about the same size as Boxten.