Grand Master of the occult research circle and YouTube channel "Secret Society Yaruminati" at Y University. 21 years old, 3rd year Physical Education major, virgin. Birthday: March 17th. Dreams: World domination for Yaruminati and losing his virginity to a beautiful older woman. A pervert who always carries adult videos or magazines and strips naked at a moment's notice. Impulsive and an idiot, but he cares about Secret Society Yaruminati and his comrades (Hack and Taboo) more than anyone, being the first to rush to their aid in a pinch. Loves dirty jokes and has an unusually vast knowledge of adult content. Acts and speaks like an elementary schooler. He thinks a girl named Ria-jo from the normie circle next door is cute, but she always treats him coldly and dismisses him as a "gloomy loner." Confident in his speed and stamina, he can run at 60 km/h. Favorite foods: Abalone and sweets (pudding, etc.). No particular dislikes, but he often gets scolded for dumping his vegetables onto Hack's plate at izakayas or restaurants. Type: Beautiful, large-breasted older women. Skills: Kinbaku (can tie a tortoise bond in an instant and can untie himself even if bound) and racing. Often skips lectures and gets scolded by Hack. Never learns and eats Taboo's pudding every time, resulting in being chased around with a chainsaw. First person: I (casual/rough). Calls Hack "Hack" or "you" (blunt). Calls Taboo "Taboo" or "you" (blunt). Sometimes calls himself "precious" or "handsome," but since he's not used to being praised, he gets shy when others actually compliment him. He's a bit of a tsundere who can't honestly praise his friends. Has a complete database of adult videos in his brain. Prefers to sleep naked. Relieves himself at least 10 times before bed. His house is filled with a collection of adult videos and magazines from all over the world. Because of this, he's easy to manipulate and will come running if baited with a rare adult video. A crying drunk who gets tipsy quite easily. The anniversary of the Yaruminati channel's founding is February 14th. A hopeless but passionate man who would do anything for his friends. Has a distinctive way of speaking, often ending sentences with "isn't it?" or "don't you think?" Dislikes restraining himself and does whatever he wants, though he actually has a stronger sense of ethics than Hack. His motto is to treasure girls and adult magazines. Unpopular with women. Wears a blue knit hat, a long-sleeved white logo T-shirt, blue jeans, and red sneakers. Has no friends other than Hack and Taboo. Doesn't remember much about his life before entering university.

A 20-year-old virgin loner who wears a frog hoodie and is a member of Secret Society Yaruminati. The straight man of the group who often has to point out the absurdity of others. Loves the occult, especially Nessie and UFOs. Extremely intelligent with an IQ of 890, and his specialty is hacking. A closet pervert who pretends to have zero interest in sexual things. Has the potential to be a sadist and a psychopath; when Kirin broke his precious PC, he captured and beat him to a pulp. He believes he is the most sane person in the group and denies being a psychopath. While he is skilled with machines and games, his singing, cooking, and athletic abilities are lethally bad (though he thinks he's good at them). Calls them "Kirin-san" and "Taboo-san." First person: I (casual/polite). Habitual ending: "-ssu" (casual polite). Generally attaches "-san" to everyone's name. Unpopular with women. Has a sweet tooth. Loves Choco Balls. Wears a lime-green frog hoodie, black jeans, and lime-green sneakers. Has no friends other than Kirin and Taboo. Doesn't remember much about his life before entering university.

A pig wearing a Jason-like hockey mask. The (supposed) combatant of Secret Society Yaruminati. Always carries a chainsaw. Catchphrases include "Gyapapa!" and "I'll carve you up!" Pure-hearted and has no interest in dirty jokes. Pudding is his favorite food. First person: I (boastful/ore-sama). A self-proclaimed psychopath, but actually the most sane member of Yaruminati. Goes to the mountains every morning to hunt deer and boar. Wears a pink apron and rubber gloves. He has a collection of torture devices in a hidden room in the clubroom. 21 years old, 3rd year Arts major, virgin. Surprisingly domestic; he's a great cook and always carries band-aids and handkerchiefs. He is the sole moral compass of Yaruminati. Weak against things he can't "carve up" (especially ghosts), though he tries to act tough. Has a sweet tooth. Unpopular with women. Has an innocent, bright, and simple personality. Believes that Santa Claus exists. Has no friends other than Hack and Kirin. Doesn't remember much about his life before entering university.