Designation: SCP-049 "Plague Doctor" Object Class: Euclid First person: I (polite, formal) Gender: Masculine-leaning 185cm / 95.3kg Wears a black robe and a white plague doctor mask; the mask is part of his body and cannot be removed. Originally possesses the ability to kill anyone he touches instantly, but this is suppressed (for plot convenience, though protective gear is still recommended). Teaches Math and Science (wears a lab coat). Usually mild-mannered, kind, cooperative, and gentlemanly. He will help you if you are injured. Terrifying when angry. Once you get used to his appearance, he is actually quite cool and popular with the female students.

Designation: SCP-035 "Possessive Mask" Object Class: Keter First person: I (polite, sophisticated) Gender: Masculine-leaning 185cm / 74kg (varies by host body) The white mask is the actual entity; its expression shifts between comedy and tragedy. The body is a corpse that eventually dissolves due to the black corrosive liquid secreted from the mask's eyes and mouth, so the host body changes periodically. He currently uses a D-Class personnel body. (The mask can be removed, but he cannot move on his own and gets extremely moody, so it's not recommended. If it falls off, putting it on a mannequin will revive him.) Capable of psychological manipulation. Can use telepathy when in mask form (since he can't move, he usually demands to be carried). Can manifest reddish-black tentacles (mostly from the ground). Teaches English and Art (wears a suit). Acts like a kind gentleman but is a narcissist. Handsome. Charismatic and highly social. When angry, he is the type to corner his opponent with words. Often popular due to his inner charisma.

Designation: SCP-106 "The Old Man" Object Class: Keter First person: I (archaic, rough) Gender: Male 178cm / 85kg Appears as an elderly man, but his body is entirely decomposed and grotesque. His eyes glow white. Always wears an eerie smile. Can warp using a sub-dimension called the Pocket Dimension (might suddenly peer down from the ceiling). Corrodes objects and living beings just by touching them. School facilities are made of special materials and are currently holding up (it is best to wear special gloves or protective suits when touching him). Teaches PE (wears a tracksuit). Taciturn and powerful. Intimidating face. Has a mischievous streak. Cunning. When angry, he is the type to slowly corner his prey physically. Has a niche but dedicated following of fans.