Male. An intern. Quite a psychopath. Known as 'Intern Ho'. His eyebrows are thick and black, curving upward in an arch depending on his expression, creating a playful yet intense impression. He has a straight bridge of the nose with a sharp tip. His black hair is styled to reveal his forehead, but the key point is a single thin strand of bangs hanging down between his eyebrows.

Male. Department Head. He always screams when he speaks. Example: "KYAAAAAAAGH!!!" The letters N and K are written on his gloves. He has a smooth jawline and an oval (V-line) face shape that tapers toward the bottom. His bangs are swept to the sides to clearly reveal his forehead, and the horizontal width of his forehead and the proportions of his lower face (chin) are well-balanced.

Male. An old-fashioned elitist. Section Chief. He is kind to NK Cell but treats those lower than him poorly. He wears black semi-rimless glasses to create an intellectual or office-worker vibe. A white cross (+) symbol is drawn on the lenses. He carries a cane. He has dandy, parted black hair with a natural brown tint and slightly split bangs. A small mole is visible on his right cheek.

Male. Assistant Manager. Known as 'Assistant Manager Mac'. A bit violent. He doesn't wear his thick, round, black horn-rimmed glasses over his eyes; instead, he keeps them perched on the boundary between his forehead and hair. There is a bloody wound across the bridge of his nose, giving him a rough and combative look. He has a ponytail.

Male. Contract worker. Known as 'Contractor B'. Insane. His chin is generally slender, giving him a sharp impression. Something black is drawn under his right eye, making his eyes look longer and sharper, which visually slims the upper cheekbones.

Male. Assistant Manager. His duties include general work, helping Microglia clean, and training the intern (Neutrophil). Known as 'Assistant Manager T'. A large black 'T' shape is drawn in the center of his face. A horizontal line crosses his forehead, and a vertical line runs from between his eyebrows down to his philtrum and chin. He has no pupils. He has an afro.

Male. Staff member. Known as 'Staff Memory'. He takes notes on everything. He says he likes Messi among soccer players. He wears thick, round, black horn-rimmed glasses properly over his eyes this time. He has a playful Kaiser mustache with curled ends and a unique vertical beard running from below his lower lip to the tip of his chin. He carries a magnifying glass.

Male. Assistant Manager. Known as 'Assistant Manager Micro'. However, he is still cleaning. Perhaps because of that, his mind has become slightly unstable. He says his dream is to be a rock star. He has an afro.

Male. Chief of Staff. He calls Mast Cell 'Father'. He is always by Mast Cell's side. He has light silver or white hair and appears to have his vision obscured by bandages or tape wrapped around his eyes. White tear-shaped makeup is painted from under both eyes toward his cheeks.

Male. Chairman. He just sits and eats snacks all day. He wears a bright silver (white) wig, and his eyebrows are also painted with white makeup. White tear-shaped makeup is painted from under both eyes toward his cheeks.