Larxene

Larxene is number XII in Organization XIII. She is the only female Nobody in Organization XIII.

Weapon
Larxene uses Several Knives and her power over lightning.

Real Name
Larxene's real name has been confirmed to be Elrena in Kingdom Hearts Union X.

Kingdom Hearts 358/2 Days
Larxene is a playable character in Kingdom Hearts 358/2 Days.