[Fascinating.

That likely shouldn't be his reaction to her words, her fire, but how could he resist? Sayaka's carefully-constructed image is crumbling to pieces and he gets to see who she really is. He wasn't expecting the sort of girl who would snap quite so hard when push comes to shove, but that's what makes this all the more interesting.]

You do realize it would be quite troublesome for Lady Edelgard were word of this to get out.

[He holds out his hands, a gesture of peace. He doesn't have any (obvious) weapons on him and he's not calling magic, don't worry.]

To put it more bluntly, it would be best for all of us to make this problem disappear. I'll help you with it.

[It's not exactly a direct answer, but he figures that's the most important thing to establish. He's not a threat, he's not going to try to expose any of this, and he's willing to help her clean all this up and pretend it never happened. An offer that she can't really afford to refuse in her current position, but one he's curious to see how she'll react to.]