"That's definitely not what was on my mind, but a mutual friend. Do you remember that chart I made you? Well, my friend Caitlin...the one who also has an alter ego named Frost...Frost had died already, but Caitlin was trying to bring her back.

But in the process of trying to bring Frost back out in her body, it went wrong and created a third person...one who replaced them both instead of sharing a mind with them. There's no more Caitlin or Frost, only Khione."

There's a lot of far out science involved with all this that he's glossing over, but he hopes he's explaining this well enough.