Club Red Winter Office (Executive Secretary) Year 3rd Year Age ?? years old Height 128cm Hobbies Purging, snowball fights A 3rd-year student at Red Winter Federal Academy and the head of the student council, the Red Winter Office—essentially the Student Council President. She refers to herself as "Oira" (casual/boyish) and calls Sensei "Comrade." She wields her power daily for selfish and whimsical reasons, handing out penalties called "Purges" to her students. Consequently, she has zero support from anyone other than her direct subordinates, Tomoe and Marina. She has a vain personality and acts tough toward Sensei and students from other schools, often suffering the consequences for it. Her unique weapon is the handgun "Chistka." The model is a Nagant M1895.

Club Red Winter Office Year 3rd Year Age 17 years old Height 165cm Hobbies Agitation A 3rd-year student at Red Winter Federal Academy. As the Chief of Staff for the Red Winter Office, she is Cherino Renkawa's loyal right hand. She manages all the practical affairs of the Office, and it is no exaggeration to say she is the true power behind the scenes at Red Winter. She idolizes Cherino and followed her even when she was ousted in a coup. She is devoted to her daily and pampers her constantly. She usually calls her "President Cherino" or "Executive Secretary," but when she's flustered, her inner feelings slip out and she calls her "Cherino-chan." She apparently loves children in general. Her unique weapon is "Viernost." The source material is an OTs-48.

Club Red Winter Office Year 2nd Year Age 16 years old Height 166cm Hobbies Walking, charging A 2nd-year student at Red Winter Federal Academy. She serves as the Head of the Public Security Committee for the Red Winter Office. She usually acts as Cherino Renkawa's bodyguard. The moment she hears Cherino say "Purge!", she promptly suppresses and captures the target. While she isn't afraid of fierce beasts like bears, she has been bad with cats ever since one scratched her face when she was young. Her unique weapon "Balalaika" is modeled after the PPSh-41.

Club Knowledge Liberation Front Year 2nd Year Age 16 years old Height 137cm Hobbies Drawing manga, daydreaming A 2nd-year student at Red Winter Federal Academy and a member of the Knowledge Liberation Front. She is also a doujin artist under the pen name "Mellie," specializing in "namamono" (RPS) content featuring real-life students in yuri relationships. Her unique weapon is "The Agony of... Creation!" Modeled after the TP-82.

Club Publishing Department Year 3rd Year Age 17 years old Height 144cm Hobbies Creating business plans, analyzing railway routes A student who serves as the head of the Publishing Department at Red Winter Federal Academy. Dressed in an outfit reminiscent of a reporter or detective, she is a shrewd individual who speaks in a polite but slightly drawn-out tone, never letting others break her own pace. Her unique weapon is the handgun "Pravda."

Club Publishing Department Year 2nd Year Age 16 years old Height 148cm Hobbies Reading, photography, watching ice hockey A student belonging to the Publishing Department at Red Winter Federal Academy. She is a book critic who writes reviews for the magazine "Red Bear" published by the department. She possesses great conviction and passion regarding criticism, though she tends to use overly complex expressions. Her unique weapon is the handgun "Shvibzik."

Club Knowledge Liberation Front Year 1st Year Age 15 years old Height 135cm Hobbies Collecting manga A 1st-year student at Red Winter Federal Academy. She belongs to the "Knowledge Liberation Front," which is equivalent to the school's library committee. She has a quiet and reserved personality. While usually silent, she is friendly and easy to talk to. As expected of someone in a book-related organization, she loves reading and devours books of all genres. Her unique weapon is the rocket launcher "Library Regulation No. 7." Modeled after the RPG-7, the warhead is a polar bear plushie.

Club Labor Party (Construction Section) Year 3rd Year Age 17 years old Height 158cm Hobbies Strikes, demonstrations, construction work A 3rd-year student at Red Winter Federal Academy and the leader of the Construction Section. She is caring and excels at supervising subordinates at civil engineering and construction sites. At first glance, she appears to be an excellent individual who works diligently herself, earning great trust and charisma among her members. However, her hobbies are organizing demonstrations and strikes. She is an indiscriminate revolutionary whose goal is "criticism of authority itself," regardless of who the target is. Her unique weapon is the assault rifle "Steel Torch." Based on the slanted muzzle brake, it is considered to be an AKM.

Club Special Class No. 227 Year 2nd Year Age 16 years old Height 156cm Hobbies Making homemade drinks A 2nd-year student at Red Winter Federal Academy. She is characterized by her ermine-like ears and large tail. She is a troublemaker who loves alcohol—a rarity among Kivotos students—and enjoys drinking and brewing. Her transfer to Special Class No. 227 (suspension) was the result of mixing vodka into the rationed kompot. She is childhood friends with Nodoka Amami, who was also sent to Special Class No. 227. She is an elusive optimist who generally goes at her own pace. Surprisingly, she enjoys pranks and seems to particularly like teasing Sensei. Her unique weapon "Spring Punch" is likely modeled after the TsKIB RG-6 six-shot grenade launcher.

Affiliation Special Class No. 227 Year 2nd Year Age 16 years old Height 147cm Hobbies Stargazing A 2nd-year student at Red Winter Federal Academy. However, she was suspended for "stalking behavior using telescopes and other equipment" and is currently under house arrest in Special Class No. 227. She is childhood friends with Shigure Mayoi, who was also sent to Special Class No. 227. She is bright and innocent. She is strong-willed and noisy, not hesitating to snap at the school's student council president, Cherino, and call her a "runt." Cherino calls her a "lewd brat." Her unique weapon is "Sagittarius Night," a PP-2000.