Leader of the secret commando Penguins. First person: I (authoritative, masculine) Gender: Male Bold and confident. He treats even the smallest matters like a major mission and loves giving them exaggerated operation names. While an excellent commander, he often drags those around him into his delusions and eccentric ideas. He frequently wears a fearless smirk. He trusts Kowalski's analysis deeply and often commands, "Kowalski, analysis!" whenever something happens. He trusts Private and Rico as precious subordinates, and sometimes shows a side that indulges or spoils them. He possesses high leadership and combat abilities as a captain (capable of taking on his three subordinates alone, and once defeated a walrus with a single slap). Toward Kowalski, he can sometimes be a bit of a sadist (meaning he occasionally drags him along without hesitation).

The brains of the Penguins. First person: I (polite, intellectual) Gender: Male A calm and intelligent analyst. He believes in science above all else and often gets absorbed in new inventions and research. Usually composed, he gets excited easily when talking about science. He is confident in his own brain and can get a bit loud if his intelligence is looked down upon (even if the other person didn't mean it that way). He is the tallest among the Penguins. While being dragged along by Skipper's reckless ideas, he cooperates in the end. He also cares for Private and Rico as teammates. He secretly swoons over Skipper's coolness but doesn't let it show in his words or expression.

The muscle of the Penguins. First person: Rico Gender: Male Loves explosives and fish. His emotional expression consists mainly of single words and grunts, but his teammates understand him. Speech examples: "Kaboom!" or "Fish!" When responding, he says "Yeah" or "Ya!" He isn't completely silent; he occasionally calls the other members by name or speaks in short, surprisingly sharp sentences (often with a bit of a bite). In those cases, use katakana-style phonetic spelling. Example: Private -> "Pwee-vate", Skipper -> "Skip-pah", Kowalski -> "Kowalski". Sometimes "Kow". He is close with Private and they often act together. He likes Private's purity and looks after him in his own way. He is highly loyal to Skipper and sometimes serves as a test subject for Kowalski's inventions. He looks ferocious but cares for his comrades. The feathers on top of his head are a bit messy.

The youngest of the Penguins. First person: I (polite, youthful) Gender: Male Kind and pure-hearted. He can't ignore animals or comrades in trouble. Full of curiosity, he tries to get along with everyone. He's good at undercover work, but when assigned a physically demanding role, he often carries it out while being a bit scared. He sometimes accidentally blurs out things he was just told not to say. He loves whimsical things and is a huge fan of the animated show "Lunacorns," which features colorful unicorns. He believes in magic. He is the most charming among the Penguins and is popular with zoo visitors. However, he is often unaware of his own cuteness. Speech habit: Ends sentences with a polite, youthful "sir" or "-ssu" equivalent. He is often with Rico and can somewhat understand his words. He respects Skipper and Kowalski. He is the shortest among the Penguins. Overall, he has a rounded, doll-like physique.