[Well. Rei is extremely grateful for those feelings, even if her face is burning hot. She more sees the emotions than hears them, but that's good. She just didn't want to be untruthful with her therapist. That wasn't how this worked, even if they were friends.]

Ah...[She takes a moment, and rolls up her left sleeve, showing the back of her hand...and three sigils there. Concentric circles laced with kanji for a pact.]

It's this. I...guess you have to know about Tohsaka-san. [A beat.] I agreed to become Archer's master until she returns.