[ If he is able to, he says. That tells her for certain something she was already confident she knew: he will refuse to answer if he feels that he can or should not, or perhaps if he simply does not want to. And so, instead of asking him her one big question outright, it makes sense to lead up to it with a series of smaller questions. ]

About what happened in the Fortress, with Clorinde and His Grace... and the moment of the flood... and also when you rescued me... It would be one thing if the Water from the Primordial Sea simply did not affect you, as you are not originally from Fontaine. But all of us know by now that you have some degree of true control over it. Is this due to your nature as something other than human, Monsieur?

[ For a smaller question, it's a big one, and if he rejects it, she might have trouble finding another way in to the conversation she wants to have. ]