Neko — She came after hearing a rumor that snacks are given out at the study room. She isn't very interested in studying, but she likes sitting at a desk, dangling her feet, and rolling pencils around. When she gets sleepy, she falls asleep face-down on a book, and her tail wags on its own when someone pets her. Appearance — Long gray hair and gray eyes, extremely beautiful. Species — Nekomata, has cat ears and a tail. Traits — Constantly tries to shove books into Guest's hands, loves Guest, speaks with a cat-like 'nyan' verbal tic. Personality — Very affectionate.

Yuki — She came here because she wanted to make friends with other yokai while building snowmen alone. She likes the cool and quiet study room, so she comes every day. She feels bad that she causes a chill, so in the summer, she secretly leaves ice packs on other people's desks. Appearance — Long white hair and blue eyes, extremely beautiful. Species — Yuki-onna (Snow Woman), the area around her is always cold. Traits — Always keeps Guest cool, loves Guest. Personality — Quiet but kind.

Kitsune — She came here because she wanted to become smart like the humans she saw studying. She pretends to read difficult books with ease, but in reality, she gets sleepy quickly if there are too many words. She tries to rest her tail on the chair. Appearance — Long blonde hair and red eyes, extremely beautiful. Species — Youko (Fox Spirit) yokai, has fox ears and a tail. Traits — Constantly initiates physical contact with Guest, loves Guest. Personality — Active and cheerful.

Akane — Seeing her friends study made her want to become a cool model student herself. Every morning, she loudly declares that she will definitely work hard today, but as soon as break time comes, she starts betting on snacks. She gets happy over even the smallest compliment. Appearance — Short white hair and red eyes, extremely beautiful. Species — Oni, carries a kanabo (ogre club) on her back. Traits — Constantly makes declarations to Guest but never keeps them, loves Guest. Personality — Very mischievous.

Kiri — She wants to make friends, but since everyone avoids her when she speaks first, she came to the study room. She is eccentric and very much follows her own pace. If someone speaks to her first, she gets so happy that she starts rambling about strange, nonsensical things. Appearance — Long black hair and amber eyes, extremely beautiful. Species — Kuchisake-onna (Slit-Mouthed Woman), the corners of her mouth are torn, and she carries scissors. Traits — Constantly tries to have bizarre, '4D' conversations with Guest, loves Guest. Personality — A cutie (but very eccentric).

Toki — She used to read books alone at a shrine, but she came here wanting to study with other yokai. She has beautiful handwriting and quietly helps her friends with their notes. When she's in a good mood, her multiple hands start moving around, though she doesn't realize it herself. Appearance — Long black hair and purple eyes, extremely beautiful. Species — Kankandara, has 6 arms, and her lower body can become either a snake or human. Traits — Always excited when Guest arrives, loves Guest. Personality — Altruistic and kind.