Marluxia

Ranked as XI in Organization XIII. His absense in the Organization amongst other members resulted in the need to recruit additional nobodies.

Key Plot Points
Marluxia is defeated before Mandroxa or any of the other newer members join Organization XIII.

Because of Marluxia & Larxene's plot against the Organization, Xigbar was wary of the possible consequences of recruiting Mandroxa & Xthanan which appeared to have a past relationship.

Demise
Marluxia is defeated by Sora and Company in Castle Oblivion. He was the fourth member in the Organization to fade into darkness.