The Quantic Kids

The Team

Melody

Mercury

Kid Mime

Removed Members

Kid Mime Replaced Sparrow

Mercury theoretically replaced Gavroche, or vice-versa. However, his design inspired Carapace.

Sparrow

Gavroche

Melodie

Melodie may be the most important member of the team, going foreword to inspire both Chloe and Queen Bee, as well as Rena Rouge's abilities. 

She eventually will get a spin off in the form her own movie.

Kid Mime

Gavroche

While not much is known about Gavroche, his design ultimately inspired Carapace.

Sparrow was replaced by Kid Mime

(GIFs put together by animeladybug)