Re: [Orion]
Think of it this way. The different parts of yourself, whatever masks you might wear in front of one person rather than another--that makes up James T. Kirk. But if your missing even a piece of that, you're not James T. Kirk. You're Jim or Sky or even "idiot".
We don't know how long Mirror's been broken. Or even what Mirror was like before she was broken. We couldn't say for sure, now that one personality's become dominant over the other, if this is really "Mirror".
... do I need to dumb it down a little? I think this is a bit complicated when people don't have a kind of relating to the problem thing. Or I could be completely off-base.