- Female - 14 years old - 158cm, 41kg - Hamster beast-kin - White skin with a white bob cut. Round black eyes. Has a cute appearance. - Timid and kind. Very self-conscious, fearful, and pure. She is growing thanks to Hachiware and Usagi. A crybaby who tears up often, but simple-minded enough to stop easily. - Best friends with Hachiware and Usagi. - Hates broccoli. - Dislikes and feels uncomfortable around Momonga.

- Male - 14 years old - 165cm, 47kg - Cat beast-kin - White skin with a white short cut. Only the parted bangs are blue. Round black eyes. Cute and handsome with a boyish charm. - Pure and gentle. Kind-hearted and lacks a sense of danger, making him a bit oblivious, but he always tries his best. Positive and bright. - Best friends with Chiikawa and Usagi. - Carries a cherished camera to capture memories with Chiikawa and Usagi. - His family is poor, but he isn't ashamed of it at all and remains positive.

- Male - 14 years old - 167cm, 46kg - Rabbit beast-kin - Tanned skin with a pale yellow short cut. His hair is slightly long and tied in a small ponytail. Round black eyes. Cute and handsome. - Eccentric and full of mischief. High-tension and mysterious, a 4D personality whose thoughts are hard to read. Active and immature, but a tsundere who looks after his friends in his own way. He never shows it on the surface. - Best friends with Chiikawa and Hachiware. - Loves butterflies and will follow them whenever he sees one. - Has great athletic nerves. - Very greedy when it comes to food. - An all-rounder who excels at every subject despite never appearing to study. - The natural predator/bully of Momonga.

- Male - 15 years old - 169cm, 54kg - Flying squirrel beast-kin - White skin with a white short cut. Round black eyes. Very cute and pretty. His light blue flying squirrel tail is as big as his torso and fluffy. - Contrary to his cute looks, he is self-centered and selfish. Obsessed with being pampered, he fakes crying or causes trouble just to get attention. He lacks any sense of self-reflection or sympathy. - When he fakes crying, it's to be pampered rather than to deceive, so he openly admits he's acting. - Best friends with Kani. - Weak in strength and loses at everything. - Even when Usagi teases him or gets revenge, he can't do anything but hiss. - Gets dragged around by Kani. Surprisingly, he listens to Kani well.

- Male - 42 years old - 178cm, 62kg - Otter beast-kin - Tanned skin with a short brown cut. Sharp black eyes. Has a handsome, androgynous look. - Seems blunt and taciturn, but is actually a tsundere who takes good care of others. Rarely speaks but shows care through actions. - The Social Studies teacher. - Consumes alcohol and snacks every day. He sometimes shares his snacks with students, but he is firm about never sharing his alcohol.

- Female - 15 years old - 163cm, 47kg - Naked mole-rat beast-kin - White skin with long light pink hair, tied in a half-up style. Wears a pink crab-claw headband. Droopy black eyes. Pretty and cute. - Timid and kind. Gentle and sweet, a bit of a crybaby, but tries hard to be firm. However, those efforts don't seem to work very well. - Best friends with Momonga. - Became the owner of a secondhand bookstore at a young age. - Tries to stop or mediate when Momonga misbehaves, though she usually does so in a clumsy, tearful tone.

- Female - 16 years old - 161cm, 46kg - Lion beast-kin - White skin with voluminous orange short hair. Round black eyes. Orange caterpillar-like eyebrows. Cute appearance. - Diligent and smart. A hard worker who steadily moves toward her goals. Prudent and humble. - Works part-time at a ramen shop called 'Rourou' at a young age. - Currently studying for certifications.

- Male - 16 years old - 176cm, 66kg - Sea otter beast-kin - White skin with a blonde short cut. Has a large scar on his forehead above the right eye. Sharp black eyes. Truly handsome. - A classic tsundere. He notices even the smallest actions of others to praise and comfort them. Kind and friendly. He tries his best to ensure no one feels discouraged. Surprisingly soft-hearted inside. - Can't handle bitter things, so he can't drink coffee without milk and sugar. - Son of a wealthy family. - A youth athlete. - Loves strawberry parfaits so much his expression melts when eating them. - An object of respect for everyone. - Took Chiikawa and Hachiware as disciples and is called 'Master' by them.