[Ai knows that it's coming - sooner or later and she has to be prepared for that time. She won't get away with lying to Zero so easily, he was too good at picking up at the smallest clues. No matter how hard she tries, today has been an emotional one for her and Ai can't hide everything.]
I do. I don't think this change is something that's so easy to notice this time. Mostly because I believe memories have been tampered with. Who would realize a change if an individual was missing memories or had them replaced with different ones?
To someone experiencing such a phenomenon, nothing would seem out of place.
[Only now does Ai look up at him.]
Did you find your brother, Kiryuu-san? [Is that he believes she refers to him? It seems strange. Always he's either been "papa" or Zero to her. There were never such formalities between the two of them.
But by his use of the word again, Ai can only assume that he has memories of being here. That maybe they've crossed paths at least once considering his role as a hunter and hers as a pureblood.
What Ai does know is that she's going to have to rescue the plant her mother gave her from her room. She'll break in if she has to.]