[ He expected this reaction of her, and everyone loves Lucina for her responsibility. But a forceful edge enters his voice, because he wants his sister to understand-- ]

Then I would have done the same thing! And I would have had to fight against you too, on top of everyone else! And I would have hurt you when you were trying to help me, and no one would have been any better off for it.

So don't wish you were there. You'd have been lost on me.

[ Frustration. Not just as her, but at himself too. ]