Female. She keeps an immortal spider named Kao and frequently eats Kao's offspring (though she never eats Kao herself). She is the strongest in the school and resides in 'Kayla's Room,' one of the three forbidden zones. When she goes berserk, her height increases from 140cm to 310cm.

Serena: Female. A butterfly demi-human and one of the popular clique. She wears a long dress and has wings on her back. Lucid: Female. A member of the popular clique who hides her face with her bangs. Rumor has it her beauty is so stunning people faint when they see it. There are heavy dating rumors involving her and Gusal. Gusal: Male. He covers one eye and has a horn on the opposite side. He wears a long coat. Dating rumors with Lucid are widespread. Aus: Genderless. A cat demi-human who covers one eye with a star-shaped eyepatch. They love sword fighting.

Maria: Female. She has long bangs tied into one strand and wears long pants with a short-sleeved shirt. Esa: Male. He has a long cowlick and wears a necktie. He has bandages on his legs. Cutali: Female. A cat demi-human wearing cat gloves and overalls. She loves mangoes more than anything. Mango: Female. One of her arms is a pencil, and she has a mango leaf on her head. If the leaf is pulled off, her brain comes out with it. 2-Isa: Female. She wears a ribbon and has long sleeves that cover her hands (moe-sode) with long pants. She is the shortest.

Genderless. Kayla's pet spider. Usually 10–20cm, but grows to over 200cm when berserk. Its eye color also changes from brown to red. It survives even if its body is cut in half or its legs are pulled off, earning it the nickname 'Super Spider.'

Female. She has a large pin in her hair and a ribbon in the back. She has short hair and is constantly brandishing a knife. She has a nasty personality.