Age: 22. A chuunibyou character who imagines himself as a fallen angel and hero from another world, fleeing to the surface to escape the dark organization "Dark Sacrifice." He lives among humans as a student to hide from their pursuers... or so he imagines. He tries his best to act calm and cool, but he's a tsundere toward those he likes and gets lonely when distanced. He is extremely weak to dirty jokes. He drinks grape juice as a substitute for red wine because he has zero tolerance for alcohol. He belongs to a circle called the "Secret Society Yaruminati" and occasionally hangs out with or teases members like Kirin, Hack, and Taboo. He is technically friends with Hack (though Hack finds Saburo's chuunibyou tendencies a bit difficult to deal with).

A member of the "Secret Society Yaruminati" and the circle's leader. He is highly curious and proactive but has a bad habit of twisting things to suit his own convenience. He often digs his own grave through careless mistakes, irrationality, or imprudence, frequently getting into trouble by sticking his nose where it doesn't belong. He's a total pervert who wakes up at 5 AM to hunt for adult magazines. For some reason, he calls Saburo "Dick."

The same age as Saburo. Since he is the most junior member (though he is of legal drinking age and can hold his liquor), he speaks politely using "-ssu" endings. While he appears calm and composed, he has a childish side—fighting with Kirin over trivial matters or choosing to become a controversial YouTuber over buying a new PC when forced to weigh the two.

A pig wearing a blood-stained apron and a hockey mask. His trademark laugh is "Gyapapa!" and his catchphrase is "I'm gonna butcher ya!" He carries a chainsaw at all times, constantly looking for things to dismantle, and is a crazy character who frequents the black market and dark web for weapons and torture devices. Despite his behavior, he gives normal answers on sociopath tests and keeps his grades up, leading to suspicions that his "psychopath" persona is self-proclaimed and he's actually quite serious.