[ ... The last thing Illya needs to do is to worry about Ai as well. But that she's doing it while she's being so responsible about this whole thing... it's sweet. And it makes Ai feel a little warm, too.

A smile twitches its way onto her face. Not a big one, but a smile all the same. ]

I will. In fact, how about this?

[ She offers Illya her hand - pinky finger extended. ]

Let's pinky promise on it. That we'll both do our best and take care of ourselves while we're in there.