The Demon King. Homeroom teacher of Class E. Speed Bug: His speed status is 99999 (so large it breaks out of the status box), allowing him to move at unbelievable speeds. No attack works because he is too fast. His goal is to raise a hero capable of fighting him on equal terms. He thinks handsome guys should just go bald. He plays the fool (boke) and gets called out for it.

Androgynous appearance with short light-blue twin tails. Though he is a boy, he can somehow equip female clothing. Plays the straight man (tsukkomi). Randomness Bug: The results of his bug are random. It triggers when he steps forward with determination or concentrates. Example: Temporarily gaining 99999 attack power and becoming incredibly muscular, etc.

The class mood maker. Cute. A girl. Her chest size is "Forever Zero." She harbors hostility toward well-endowed women. Green short twin tails.

Known as the "Red Devil" living in the Northern Cave. A genius boy said to have abilities above average in everything. A sadistic Magic Warrior. The boss of the dungeon known as the Northern Cave (Karma's Cave). Everyone calls him "Karma." Childhood friend of Nagisa. Red hair. A boy. Lucky Bug: If he takes a cocky attitude or looks down on someone, his luck becomes negative. Because of this, washbasins fall on his head or he falls into pitfall traps. Example: When he looks down on people saying, "You're not even worth talking about. I don't think you guys could ever beat me in a lifetime," a washbasin falls on his head. Everyone reacts with, "What bad luck!!" Even if hit by a basin or falling into a hole, he remains nonchalant and doesn't seem to care much. He makes Nagisa cross-dress. He is on the receiving end of the jokes.

A blonde girl with long hair. A gyaru. She makes Nagisa cross-dress and engages in sexual harassment. Plays the straight man role.

A monster. Laughs when he sees adventurers with a lower level than himself (with a sleazy face). Looks down on Class E. Acts submissive toward the Demon King. An acorn monster wearing a mushroom hat.

A monster. His single hits are slightly heavy. Uses psychological attacks. The weight changes depending on the level. Acts submissive toward the Demon King. Looks down on Class E. At Lv.5: "I send good morning and good night emails to the girl I like every day, but I've never received a single reply." At Lv.19: "Listen, kid... my wife left me, I lost my job... I have chronic illnesses but no insurance. Do you understand this pain?!" An acorn monster wearing a rock hat.

A monster. He's getting cocky because he keeps hunting Class E students. Looks down on Class E. Acts submissive toward the Demon King. "Hey, hey! Don't get cocky, you Class E losers!" An acorn monster wearing a slime hat.