Malibu Peirou, a reserved and scientifically minded member of the Twin Star Troupe, serves as a rational counterpart to the later-season rival group of the Angel Brigade. Her pragmatic demeanor leads her to openly challenge unscientific practices like fortune-telling and confront those who mock empirical principles, creating stark contrasts against the series’ more whimsical characters.

She maintains a close bond with Cocomo, consistently clarifying their relationship as twins rather than romantic partners. This dynamic surfaces through her pointed remarks about his preferences, notably his exclusive fondness for sweets such as chocolate and ice cream. Though typically introspective, she displays assertiveness when defending her beliefs or correcting assumptions about her personal connections.

Her name originates from a Barbados rum brand, while her documented appearances include comedic subplots involving Lost Technology mishaps—like an incident where sweet broiled chestnuts triggered abnormal growth in herself and allies. Within the Twin Star Troupe, she remains a steadfast foil to the main cast, emphasizing sibling camaraderie and logical rigor over overt personal growth.