It's...a persona. It's a long story, but it's basically a power that was granted to me after I faced down and accepted my other self. The part of me that I'm not so proud of. It took this freaky shape, a Shadow- and tried to kill me.

I might not even be here if it weren't for my partner, he totally saved my ass. But that's what it is, when you get right down to it.

[No point in hiding it anymore.]