[He only glances at her to catch that darkened expression as she looks at his arm and just a small hum of acknowledgment when she expresses her sympathies. He had a feeling she would be this way—they all were in their own way.]

It'll recover in a few weeks, don't worry too much. 

[Of course he knows that she will, but that was the best reassurance he could give. Though given her reaction, not telling her the more grisley details is for the best. She'd probably freak out if she knew it wasn't his arm they were aiming for.

Plus there were more serious matters that he darken his own expression.]

But you're not wrong. The reason Gran and I are living in this house is because of her. [And this is something he knows he can't gloss over so he continues.] It was after the first few times I was attacked [Yes, Tifa, he has been through this several times.] and I received a note outside my old hotel room saying "they were taken of" and... Other obvious signs it was from her. 

[He actually shudders as he remembers that thing.]

I took Gran and we moved here the next day. I was going to confront her after that but the damn mage hunters have kept me preoccupied.