Complexa.

First Appearance: "She's Come Undone."

Details: Frustrated with Lexa Pierce's secretive nature, Brennan Mulwray came up with this nickname for Lexa.

Brennan: "Shal, you buying this whole amnesia crap?"
Shalimar: "Think she's lying?"
Brennan: "Who, Complexa? I mean, c'mon. When has she ever told us the whole story?"