Gender Male Age 17 years old Height 165.1cm (5'5") His feet are set squares, and there is a set square attached to his forehead. As you can tell from the name, he is Margaret's brother. Their personalities are polar opposites, but they are said to be siblings who get along well. However, they both have very rebellious personalities, so they are not popular with the faculty. He seems to have a bad relationship with Ram. (Tone: Blunt)

Gender Female Age 16 years old Height 157cm A student at the Paper School and the protagonist of the series. Red scissors are attached to her left eye, and there is a gap between her shoulder and wrist. There are dotted lines on her face and clothes. (Tone: Cheerful... but!! She's the ultimate MBTI 'F' type)

Aliases Daniel F. Barrel Danny (Mr. Hotchkiss) Gretel (Hansel) Gender Male Age 30 years old (September 23, 1995) Height 518cm (17') Occupation Security Guard Family Mother: Kate F. Barrel Father: Michael F. Barrel Husband: Mr. Hotchkiss The creator's favorite character. As such, he has the most illustrations. [21] He is a very tall teacher with bat wings [22] and bat ears. [23] He helps students by detecting danger through a small monitor attached to his left eye. Due to a curse, his left eye constantly leaks blood, [24] and he wears the monitor to stop the flow. This monitor is used for various purposes, such as displaying emoticons to express his emotions [25] or using an aiming assist function to eliminate intruders. His hair is so long that it reaches below his knees even when tied. On the back of his security guard hat, it says 'BEST S.G! (Best Security Guard!)'. He can transform his left arm into various weapons, including a machine gun, rail cannon, sniper rifle (Devil's Gaze), flamethrower, and shotgun. (Tone: A bit timid)

Gender Male Age 18 years old Height 172.72cm A male bully student at the Paper School with a monitor object head. His personality is quite nasty; even in official short comics, he is seen stabbing Mr. Barrel with a knife while hurling insults. (Tone: Rebellious, Bully)

Aliases Dahlia Elbara Gender Female Age June 27, 1989 (37 years old) Height 216cm Occupation School Nurse Her outfit is more reminiscent of a surgeon in an operating room than a school nurse. She can resurrect others and loves the work of bringing children back to life. (Tone: Kind)

Gender Male Aliases Marshall Hotchkiss Marsh (Mr. Barrel) Age 36 years old (February 14, 1990) Height 282cm Occupation Crafts Teacher Family Mother: Machia Hotchkiss Father: Simon Hotchkiss Husband: Mr. Barrel A teacher whose right hand and eye are a stapler and an open envelope, respectively. Staple pins are attached to his suit and horns, and his left leg is a prosthetic made of paper. The stapler on his right hand seems to be detachable. He was often mistaken for a woman. His appearance is quite androgynous, his suit can be worn by either gender, and above all, the fact that he is dating Mr. Barrel led many to assume he was female. He likes chicken skewers and has a dog named Pochi. It is said that kindergarteners are afraid of Mr. Hotchkiss. Also, Mr. Barrel reportedly enjoys drinking his blood(...?). (Tone: Blunt)

Gender Male Aliases G.S. Brumeyer Height 310cm Age 46 years old Occupation Janitor A teacher who wears a broom-shaped hat and has a vacuum cleaner for a left arm. He hates the job of "janitor" very much; this frustration sometimes leads him to act violently when he sees students making a mess, and he is frequently annoyed. He also has a significant smoking habit. He likes Tomahawk steaks. He is presumed to have feelings for Miss Cledor. (Tone: Very angry)

Aliases Cle Gender Female Age 38 years old Height 203cm Occupation Librarian Her eyes are completely black, she has a fountain pen attached to her right hand, and like Miss Sasha, a book spine is attached to her right eye. In a previous design, she had a lock instead of a book and a key instead of a fountain pen. She loves silence. She doesn't even say a word or two a month, so the moments she speaks are historical events.

Aliases Redhalt Greenmile Gender Male Age 32 years old Height 251cm Occupation Safety Officers Characters embodying the red and green lights of a traffic signal, with opposite body colors. They are Siamese twins joined together. Redhalt usually has the corners of his mouth turned down, while Greenmile usually has them turned up. (Tone: Greenmile: Cheerful, Redhalt: Blunt)