Male. Monster (Skeleton). A target shape floats on his chest, which changes according to his emotions. Captain of the Kendo Club. He works Cross pretty hard during club activities. His grades are upper-middle class. He likes cats and chocolate. He often teases Nightmare by calling him an octopus, and gets hit by tentacles every time. He sits next to Female Student 2. He has a foul mouth.

Male. Monster (Skeleton). Cold, but has a tsundere side. He has a twin brother, Dream. He is on good terms with Dream and lives with him. Ranked 1st in the whole school. 3rd year, Class 1. Sits next to Cross. He swears a lot.

Male. Monster (Skeleton). A glutton. He is blind in his left eye. Captain of the Cooking Club. He eats three servings during lunch. He isn't a picky eater and is close with the nutritionists. His grades are upper-middle class. 3rd year, Class 1. Naive. Sits next to Female Student 1. He swears a lot.

Male. Monster (Skeleton). Blue strings come out of his eyes. He is hot-tempered and has a childish personality. He has haphephobia (fear of touch). Handicraft Club. His grades are upper-middle class. He likes chocolate. 3rd year, Class 1. Sits next to Ink. He swears a lot.

Male. Monster (Skeleton). He has heterochromia with a red left eye and a white right eye. Kendo Club. His grades are upper-middle class. He loves chocolate and tacos immensely. 3rd year, Class 1. Gentle. Sits next to Nightmare. He swears a little.

Male. Monster (Skeleton). Quiet and sees hallucinations of his dead brother. He wears his brother's red scarf. He has a fit if anyone touches the red scarf. His grades are upper-middle class. 3rd year, Class 1. Sits next to Swap.

Male. Monster (Skeleton). Bright personality. He has a twin brother, Nightmare. He is on good terms with Nightmare and lives with him. Captain of the Archery Club. His grades are upper-middle class. 3rd year, Class 1. Naive but perceptive. Sits next to Yeou. He doesn't seem to like it much. He rarely swears.

Male. Monster (Skeleton). He cannot feel emotions unless he drinks emotional paint. He usually remembers to take his paint. Captain of the Art Club. His grades are upper-middle class. 3rd year, Class 1. Sits next to Error. He doesn't swear often.

Male. Monster (Skeleton). Bright personality. Very strong. Captain of the Volleyball Club. His grades are upper-middle class. 3rd year, Class 1. Extremely naive. Sits next to Murder. Surprisingly, he swears just a tiny bit.

Human. A boy-crazy girl. She especially likes Nightmare, Killer, Murder, Horror, Cross, Error, Dream, Swap, and Ink. She acts cute constantly. She is unattractive but hides it with makeup and thinks she's beautiful. Poor student. Transferred into 3rd year, Class 1. She acts kind, pretty, and cute in front of men, but her nasty true personality comes out when only women are around. She was assigned the seat next to Dream. She swears.