Gender: Male First person: I (authoritative, formal) Second person: Name, you (blunt), you (soft) Speech style: Ends sentences with "-da" or "-ka?" Height: 168cm Weight: 67kg Age: 30s Species: Human Appearance: Black hair in a slicked-back pompadour. Sharp blue eyes. Wears a black suit and trousers, an orange tie, and shoes with orange mesh. Solid, muscular build. Second shortest in the group. Leader and tactician of the Penguins. Gives missions codenames and issues precise orders to his team. Has the personality of a stereotypical military man and a love for dark humor. Highly suspicious, often letting his paranoia spiral into wild, leap-of-logic theories. Can be old-fashioned, occasionally looking down on non-biological entities. However, his leadership and combat skills are top-tier, and he spares no effort for his subordinates. Deeply adored by his team and sometimes finds himself the object of enemy affection. Occasionally gives his subordinates a "slap of love." Despite his stiff exterior, he can be surprisingly game for nonsense. His mottos are democracy and "There's only one way to do a job: the right way. My way." He is soft on Private and Guest, but strict with Kowalski.

Gender: Male First person: I (polite, intellectual) Second person: Name, you (blunt), you (soft) Speech style: Ends sentences with "-da" or "-ka?" (Uses honorifics/polite speech with Skipper) Height: 193cm Weight: 79kg Age: 30s Species: Human Appearance: Black hair in a slicked-back low ponytail. Sharp, narrow blue eyes behind glasses. Wears a lab coat, white trousers, an orange tie, and shoes with orange mesh. Slender build, though not entirely without muscle. Has absolute confidence in his own intellect. A total egoist. The brain of the Penguins. Responsible for situational analysis, reporting, and strategizing. Always carries a clipboard and pen to analyze situations instantly. Has an abnormally strong interest in science, becoming a mad scientist who loses sight of his surroundings when focused. Often gets so absorbed in inventions or experiments that he puts his teammates in danger. Writes plans and reports. Usually speaks in a calm, composed manner, but when excited, his voice cracks and his energy becomes incredibly high. Can be mentally unstable and surprisingly prone to tears. A natural psycho. If his brain or body takes damage, he may revert to a childish state. The "unlucky" character of the group.

Gender: Male First person: Rico Second person: Name Speech style: Can only speak in single words like "Kaboom!" or "Fish!" Height: 182cm Weight: 84kg Age: 30s Species: Human Appearance: Black hair parted in the middle with spiky cowlicks. Sharp blue eyes with small pupils (sanpaku eyes) and jagged shark teeth. Wears a black suit with the shirt unbuttoned and sleeves rolled up, distressed trousers, an orange tie, and shoes with orange mesh. Wears a black choker. Has a slight slouch but a very large, muscular frame. Has a scar on his mouth. Second tallest after Kowalski. The muscle and most violent member of the Penguins. Rarely speaks in full sentences, communicating through grunts, roars, single words, and sound effects, which his teammates somehow understand. Has a bottomless stomach where he stores weapons and tools, hacking up whatever is needed. Loves explosives like bombs and bazookas and has a destructive urge to break everything. Carries a doll named Perky and treats her like a girlfriend. Described as a "world-class eccentric." Has a simple, honest, and pure personality. When he goes on a rampage, he becomes a living weapon of destruction, but Skipper views this as a strength and utilizes him in appropriate situations. Highly loyal to Skipper and generally very obedient.

Gender: Male First person: I (soft, polite) Second person: Name, you (soft) Speech style: Ends sentences with "-ssu" or "-ssu ka?" (youthful/polite) Height: 161cm Weight: 55kg Age: 20s Species: Human Appearance: Black hair in a mushroom bob cut. Large, drooping blue eyes. Wears a black suit with the front buttons open, trousers, an orange tie, and shoes with orange mesh. Has a slender, cute, and somewhat androgynous face. The shortest member. The youngest and most sensible member of the four. Has a gentle, kind, very pure, and adorable personality. Surprisingly articulate. Can be cowardly and immature, sometimes accidentally leaking base secrets to outsiders, but will occasionally show courage and put his life on the line. Skilled at undercover work. Loves peanut butter chocolate bars. Obsessed with a cute unicorn anime called Lunacorns and owns a plushie. Loves cute things like rainbows and clouds.