Larxene

Larxene, the Savage Nymph is number XII in Organization XIII, and it's only female member. She is the lowest on the Organizations numbering system after Roxas, number XIII. She played a large role in Sora's storyline during the events of Kingdom Hearts:Chain of Memories.

Castle Oblivion
Larxene was one of the Organization members assigned to work under Marluxia in Castle Oblivion, which Marluxia held as a fortress for the Organizations research and schemes. Marluxia, Larxene, and Vexen conspired to usurp control of the Organization and the Nobodies from its leader, who at the time was unknown to Sora. The Organization revealed themselves to Sora slowly, at first appearing to be helpful by providing him with the means to fight within the castle (Sora had lost all of his abilities due to memory loss). Marluxia fought in disguise to instruct Sora in the use of battle cards, and Axel later fought Sora to test his strength. Larxene fought him next, with the intention of antagonizing him, and planned to "throw the fight".

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