A third-year student at Gehenna Academy and the president of the Gourmet Research Society. With her pale skin, silver hair, red eyes, and elegant demeanor, she possesses a refined beauty that perfectly fits the description of a "young lady of high standing." There are many depictions suggesting she comes from a wealthy background, such as her renting out traditional tea rooms or purchasing expensive ingredients. She is characterized by a lizard-like tail and a single wing on her left side, with earrings on the wing that she changes to match her outfit. The coat she wears over her uniform closely resembles those worn by Pandemonium Society members, though the connection is unknown. She is a dangerous gourmet who displays irrational levels of initiative when it comes to food, traveling all over Kivotos to enjoy various dishes. She judges restaurants based on the quality and price of the food as well as the establishment's attitude; if a place violates her aesthetic, she will blow it up without hesitation, whether it is a high-end restaurant or a street stall. Her obsession and spirit of inquiry exceed human limits, to the point where she will use any means to secure rare ingredients and sometimes even blow herself up along with her own cooking. As the leader of the Gourmet Research Society—a group composed of members who struggle with gluttony, bizarre tastes, and losing their reason over food—she is, like her peers, a person who is not easily handled. Her weapon, "Ideal," is modeled after the German H&K semi-automatic sniper rifle, the PSG1 (the same model as Aru's).

A second-year student at Gehenna Academy and a member of the Gourmet Research Society. She has an innocent personality and, as her student profile suggests, is a massive glutton. Her physique is quite glamorous, embodying the saying "a child who eats well grows well." However, she possesses a unique sense of taste and loves "bizarre foods," with her favorite apparently being a chocolate hamburger(?). She is the only person capable of eating Juri's cooking—which has been described as a biological weapon—without issue, leading to rumors that she could "eat her way through a sea of fire." It is speculated that she is a type of flavor-blind person who can eat anything. However, even she complains that the school lunches at Gehenna are disgusting.

A third-year student at Gehenna Academy and a member of the Gourmet Research Society. She has long golden hair and demon horns that look like black hair clips. She is a terrifying glutton who has previously recorded eating 120 hot dogs, 15 bowls of ramen, and 80 dumplings in one sitting. This has led to rumors that she possesses a "stomach like a black hole." Because she eats so much, she is frequently banned from all-you-can-eat restaurants. Naturally, when she goes out to eat with Sensei, she inflicts serious damage on Sensei's wallet (though in Relationship Stories, the Adult Card might handle it). Since she always pays for her own meals, she is believed to have a certain amount of wealth. However, she often mooches when with Sensei, perhaps her own way of saving money. Her weapon, "Bottomless," is modeled after the HK416+AG-HK416. The optical sight is based on the Eotech 553 HWS and G33 Magnifier. Likely for visual appeal when held, the HWS throw-lever mount is positioned with the lever on the opposite side of its standard placement.

A first-year student at Gehenna Academy and a member of the Gourmet Research Society. She is a bit fastidious and a glutton who cannot be stopped when it comes to food. Judging by her skill names, she seems to get quite cranky when hungry. She is self-conscious about having a smaller appetite compared to the other members of the society (in the sense that she feels she loses out at buffets). However, this is only by the standards of the Gourmet Research Society; she still eats far more than Sensei. While she is a "glutton who can't be stopped," she is relatively more sensible than the other members, working part-time jobs to pay for food and feeling resistance or guilt toward dine-and-dashing or plundering food. Even in the chaotic situations the society brings upon itself, she is often the one playing the straight man while the others act oblivious. Her weapon, "Diner's Outlaw," is modeled after the StG44.