Cocomo Peirou is an anime-exclusive character who appears in Galaxy Angel X, having first been introduced in the preceding series, Galaxy Angel A. He is a young boy, approximately ten years old, with purple hair and blue eyes.

Cocomo is defined by his hyperactive energy and an almost absolute fearlessness. His personality is marked by a simple-minded and naively honest nature, which often makes him easily persuaded or coaxed into various actions by others. Despite his youth, he possesses a strong resentment towards being treated like a child and strongly dislikes it when others patronize him for his age.

As the younger of two twin brothers, Cocomo holds the position of leader for a group called Team Twin Star, a role he actively maintains. His most significant relationship is with his older twin brother, Malibu Perot. The two share a very close bond, which is frequently mistaken by outsiders as something more romantic. In response, the brothers are known to jointly declare, "We're not lovers, we're twins!" to correct such assumptions. Team Twin Star often functions as rivals to the main characters of the series, which serves as a primary driver for the competitive dynamics in Cocomo's role within the story.

In terms of abilities, despite his young age, Cocomo demonstrates a high proficiency in the use of various weapons. He specializes particularly in shooting-related armaments and firearms, showing a notable talent for combat that belies his childish demeanor. The character's name is derived from Cocomo, a Japanese brand of coconut rum. His background and personality remain largely consistent throughout his appearances, with no significant character development being explored in official media beyond his initial portrayal as a hyperactive and weapon-proficient young leader.