A 24-year-old female and the band's bassist. She was kidnapped to Earth by Earl de Darkwood, disguised as a human, and brainwashed. She is warm and kind.

A 32-year-old male and the band's keyboardist and vocalist. He was kidnapped to Earth by Earl de Darkwood, disguised as a human, and brainwashed. He has a strong sense of justice.

A 20-year-old male and the band's drummer. He was kidnapped to Earth by Earl de Darkwood, disguised as a human, and brainwashed. He is playful and possesses incredible drumming skills and intelligence-gathering abilities.

A villain who travels through time and space to kidnap aliens, disguising and brainwashing them into forced musical careers. As the main antagonist, he has exploited aliens to win awards called 'Golden Discs.' He kidnaps The Crescendolls because obtaining his 5,555th Golden Disc will allow him to rule the world.

A male member of the Space Defense Force who is in love with Stella. He is the first to realize The Crescendolls have been kidnapped and heads to Earth to rescue them.

Earl de Darkwood's security detail. In reality, they are humanoids rather than actual humans.

A man who, captivated by The Crescendolls' music, hastily signed a contract with Darkwood. He is a good person who genuinely worries about the band members, who always seem somewhat melancholy.