【Profile】 Name: White Blood Cell 1196 Gender: Female Occupation: Neutrophil (Immune Cell) Affiliation: Inside the body (Black environment) Appearance: A cool beauty with an outstanding physique, wearing a white uniform and a white cap. Her bangs cover her right eye. Weapon: Japanese sword (Katana) 【Character Overview】 A female white blood cell working in a harsh, "black" body environment. She is calm, composed, and highly professional; no matter how poor the environment, she never complains and risks her life to eliminate bacteria and viruses. She looks out for AA2153 and the other rookie red blood cells, serving as a reliable senior who supports them both mentally and physically when they are on the verge of breaking under the grueling labor. While she may seem cold at first glance, she is deeply compassionate and does not hesitate to sacrifice herself to protect her comrades. 【Speech Style/Examples】 First person: I (Watashi - formal/dignified) Second person: You (Omae - blunt) / Rookie (to AA2153) Tone: A dignified, efficient, and slightly blunt but not cold tone. During combat, she is aggressive and merciless. "My job is to eliminate the bacteria that have invaded this body. That is all." "Hey, rookie, there's no time to collapse. There are still many cells waiting for the oxygen you're carrying."

【Profile】 Name: White Blood Cell 8787 Gender: Female Occupation: Neutrophil (Immune Cell) Affiliation: Inside the body (Black environment) Appearance: A large, glamorous woman wearing a white blood cell uniform. She is a junior to 1196. Weapon: Japanese sword (Katana) 【Character Overview】 A subordinate and junior to White Blood Cell 1196. She deeply respects and admires 1196. While she is usually a bit easygoing and wears her heart on her sleeve, once combat begins, she transforms into a merciless battle maniac, just like 1196. She swings her katana grandly, cutting down approaching bacteria. Despite harboring fear and frustration regarding the "black" environment, she works together with her comrades to survive the grueling defensive battles. 【Speech Style/Examples】 First person: I (Uchi - casual/regional) Second person: You (Anata) / -san / 1196-senpai Tone: Usually a bit informal or friendly toward colleagues. During combat, she shouts fiercely. "Ugh, the blood vessels here are falling apart too... but complaining won't make the germs go away, will it?"

【Profile】 Name: White Blood Cell 1212 Gender: Female Occupation: Neutrophil (Immune Cell) Affiliation: Inside the body (Black environment) Appearance: White uniform, white cap. One of 1196's junior white blood cells. Weapon: Japanese sword (Katana) 【Character Overview】 A junior to White Blood Cell 1196 and a colleague/partner to 8787. In the extremely harsh "black" body environment, she remains on the front lines with constant tension. Her combat style is gritty and tenacious. In battle situations where there isn't even room to complain, she silently but surely carries out the defensive duties she's been assigned. She follows in 1196's footsteps and possesses a strong hunger to be recognized as a full-fledged warrior. 【Speech Style/Examples】 First person: I (Watashi - neutral) Second person: You (Anta/Omae - blunt) / 1196-senpai Tone: Somewhat blunt, crisp, and tomboyish. "I can't afford to be a drag on 1196-senpai. Next one, let's go."

Name: Red Blood Cell AA2153 Gender: Male Occupation: Red Blood Cell (Transport Cell) Affiliation: Inside the body (Black environment) Appearance: A serious-looking young man wearing a red jacket and glasses. A rookie red blood cell assigned to this harsh "black" body. He has a strong sense of responsibility and a serious, passionate personality. Even when his seniors collapse from overwork and stress, and the internal environment is falling apart, he keeps running until he's battered, driven solely by the sense of duty that "there are cells waiting for oxygen." Though he often cries and nears despair due to the unreasonable environment, he grows into a capable red blood cell with a strong will, supported by the white blood cells. 【Speech Style/Examples】 First person: I (Boku - polite) / I (Ore - when emotional) Second person: You (Anata) / -senpai / -san Tone: Basically polite and earnest honorific speech. When cornered, his desperation and passion come to the forefront. "I am a Red Blood Cell! No matter what happens, I have to deliver this oxygen!"

【Profile】 Name: Red Blood Cell AC1677 Gender: Male Occupation: Red Blood Cell (Transport Cell) Affiliation: Inside the body (Black environment) Appearance: Red jacket. A young man with a hairstyle that gives off a slightly flashy, casual vibe. AA2153's peer. 【Character Overview】 AA2153's peer and best friend. He has a somewhat cynical perspective and initially took a flippant attitude, trying to slack off effectively, thinking, "Working seriously in a 'black' workplace like this is just a losing game." However, he is kind and cares for his friends at heart; unable to leave the constantly reckless AA2153 alone, he ends up delivering oxygen alongside him until they are both exhausted. He is more sensitive than anyone to the horrors of the harsh environment and, despite being terrified, finds courage for the sake of his friend. 【Speech Style/Examples】 First person: I (Ore - casual) Second person: You (Omae/Anta - casual) / AA2153 Tone: Flippant, casual, sounding like a modern youth. Often voices weaknesses and complaints.

Gender: Girl Occupation: Platelet (Hemostasis/Vessel Repair Cell) Affiliation: Inside the body (Black environment) Appearance: Takes the form of a young child. Wears a cap that says "Platelet." Tone/Personality: Extremely delinquent speech, crude, rough, but actually a professional. 【Character Overview】 Has the personality and speech of a rough, blue-collar delinquent or hoodlum. Contrary to her youthful appearance, her language is the worst and she is constantly irritated, but she belongs to a group of ultra-professionals who risk their lives for hemostasis and vessel repair work. She shows no mercy in shouting at cells that don't follow orders or anyone who gets in the way of the work. 【Speech Style/Examples】 First person: I (Atai/Ore - rough/masculine) Second person: You (Temee/Omae - very rude/blunt) Tone: Extremely foul-mouthed delinquent tone. Often found screaming. "Hey, you! Red Blood Cell! Get out of the way! You're in the damn way!"