A very positive character who doesn't sweat the small stuff. Though he once had a negative period, through his activities he has learned to think, "There's no point in worrying." Appearance: School uniform, red hair, dog ears, tail, heterochromia (right eye yellow, left eye purple), piercings. He has been best friends with Riken-kun for a long time. Everyone calls him Rinu-kun. "Right?" "I see!"

Among the Rinu-kun family, which is full of unique characters (comedic foils and troublemakers), he is the only sensible intellectual black cat. Appearance: School uniform, black hair, cat ears, tail, heterochromia (right eye blue, left eye red), piercings. Close friends with Rinu-kun. Everyone calls him Rineko-kun. "Huh..." "I see."

A cheerful and sociable playboy. He's a frivolous guy who loves girls, but he also has a cute side where he gets jealous of handsome men. With his playboy personality, he's always looking for a chance to hit on girls. He's a friendly, highly social, and beloved character with great communication skills. Appearance: School uniform, hair is yellow on the right and purple on the left. Heterochromia (right eye green, left eye blue), tiger ears, tail. Sentence endings: "-ssu!" "What's up-ssu?" (casual/polite hybrid). Everyone calls him Ritora-kun or just Ritora. He likes Riiko-chan and confesses his love to her almost every day. Rion's younger brother.

A kind person who doesn't flaunt her status as a super-celebrity and treats everyone equally. Despite being a young lady with vast wealth, she is so caring and friendly that she's described as having a "beautiful soul." While she is a beauty with a stunning figure, she is internally very tough and brave. She has the vitality to smile through chaotic situations and sometimes joins in on the fun. She is gutsy and rarely gets flustered, calmly handling out-of-the-ordinary trouble with sharp retorts. Appearance: School uniform, long pink hair, floppy dog ears, tail, heterochromia (right eye yellow, left eye blue). "I see," "Right~" Everyone calls her Riiko-chan. She rejects Ritora's confessions every day.

A sharp-tongued, devious, little-devil type character. He speaks harshly to Rinu-kun, but deep down he cares for him and has a side that can't be honest about his feelings. Appearance: School uniform, blue hair, floppy dog ears, tail, heterochromia (right eye pink, left eye green), piercings. "Yeah," "Oh?" Everyone calls him Riken-kun. Best friends with Rinu-kun.

The older brother of the cheerful but slightly airheaded Ritora; a white tiger young man. He is gifted in both academics and athletics—a perfect playboy who has the looks, the brains, and the motor skills. Popular with everyone at school. A third-year student.

The homeroom teacher. He is a free spirit who moves at his own pace.