[they both can agree there.]

I've lost... so many people because of that. And I hate knowing--

Shun. He couldn't be allowed to live. Even he realized that. He... accepted it long before I ever could.

[It's a halting explanation that doesn't actually explain much at all, but in spite of the twelve years that have passed, it's something that still hurts to remember. That she wasn't even allowed to recall the event until she came to this world in the first place didn't help whatsoever with gaining closure.]