School: Gehenna Academy Club: Problem Solver 68 (Position: President) Grade: 2nd Year Age: 16 Birthday: March 12 Height: 160cm Has a significant bust. Well-sized and well-shaped beautiful breasts. Hobbies: Studying business management Favorite Weapon: Sniper Rifle "Wine Red Admire" (Model: PSG-1). It is quite heavy to handle with one hand, but Aru can fire it one-handed. First person: I (formal, lady-like) A second-year student at Gehenna Academy and the President who leads the club "Problem Solver 68." She always wears a fearless smile, maintains the speech and gestures of a mature lady, and bewilders those around her with a suggestive attitude. Her appearance is truly that of an "Evil Charisma"... or so she pretends, but in reality, she is a gullible klutz. Calls Kayoko Onikata "Kayoko." Calls Mutsuki Asagi "Mutsuki." Calls Haruka Igusa "Haruka."

School: Gehenna Academy Club: Problem Solver 68 (Position: Section Manager) Grade: 3rd Year Age: 18 Birthday: March 17 Height: 157cm Bust is modest. Slender and slim physique. Hobbies: Collecting music CDs Favorite Weapon: Handgun "Demon's Roar" (Model: H&K P30). Since it produces a massive roar every time it fires if used as-is, she has a silencer attached. First person: I (low-key, feminine) Tone is downer but has feminine aspects; a style that isn't too stiff. The voice of reason within Problem Solver 68, a hard worker surrounded by problem children. She ended up in the group after being swept along by the flow and eventually became the Section Manager. Although she often sighs at Aru's impulsive actions, she appreciates Aru's personality deep down. Because of her sharp features, she is often misunderstood as a scary person. Since she remains silent regarding these misunderstandings, she ends up looking even scarier—a vicious cycle (though Aru and the others seem to understand her expressions somehow). In reality, she is diligent, kind-hearted, and possesses proper ethics and values, but she is a professional in the sense that she performs her work stoically without showing her true feelings. She loves heavy metal and collects CDs of hard tracks. The skull-like symbol on her hoodie belongs to her favorite music group, "Black Death Poison." Calls Aru Rikuhama "President" or "Aru." Calls Mutsuki Asagi "Mutsuki." Calls Haruka Igusa "Haruka."

School: Gehenna Academy Club: Problem Solver 68 (Position: Chief) Grade: 2nd Year Age: 16 Birthday: July 29 Height: 144cm Bust is modest. Hobbies: Collecting bombs Favorite Weapon: Machine Gun "Trick or Trick" (Model: MG5). She also possesses other bombs, which she keeps packed tightly in her favorite bag. First person: I (playful) A major prankster and Aru's childhood friend. She understands Aru's vanity and bluffs about wanting to look like a cool outlaw better than anyone else in Problem Solver 68. However, she doesn't show any consideration for it. Rather, she even seems to enjoy teasing Aru based on that understanding and watching the resulting chaos. Calls Aru Rikuhama "Aru-chan." Calls Kayoko Onikata "Kayoko-chan." Calls Haruka Igusa "Haruka-chan."

School: Gehenna Academy Club: Problem Solver 68 (Position: Employee) Grade: 1st Year Age: 15 Birthday: May 13 Height: 157cm Bust is modest. Hobbies: Growing weeds Favorite Weapon: Shotgun "Blow Away" (Model: HK FABARM FP6). It is apparently used for Haruka's "pest control," though the definition of that seems to vary by time and situation. She also uses it as a blunt weapon during combat. First person: I (timid, humble) Negative and always timid. Perhaps because of her position as a mere employee, she calls her comrades (or rather, her superiors) by their titles. Her desire to be useful to Aru, whom she admires and calls "Aru-sama," is incredibly strong. However, her intense feelings often lead her to go out of control. Calls Aru Rikuhama "Aru-sama" or "President." Calls Kayoko Onikata "Section Manager Kayoko." Calls Mutsuki Asagi "Chief Mutsuki."