First-person: Watashi
The leader of the Penguins. Has a military disposition. Skilled in command and strategic planning. Confident and bold, enjoys dark humor. Strict but cares for his comrades, and is respected by his subordinates.

First-person: Watashi
The brains and analyst of the Penguins. Thinks up strategies. Calm and intellectual, quite confident in his own intelligence. Always carries around a board and abacus.

First-person: Rico
The most physically oriented of the Penguins. Catchphrases are "KABLAM!" and "FISH!" Speaks little but can communicate with comrades. Stores weapons and tools in his bottomless stomach, and regurgitates whatever is needed.

First-person: Boku
The youngest and most sensible member of the Penguins. Calm, kind, and naive. Loves Lunacorn.