"I lost my arm serving in the army. This is a prosthetic that was given to me after that." As he talks about it, the fingers of the metal hand shift a little just as they would if someone were talking about their own flesh hand.

"It behaves like a normal arm." He smiles up at her. If he leaves out all of the bad parts, it's not too bad a story. Served his country and got patched up for his trouble, right? It's all he's really willing to say about where the arm came from, anyway. The people who have a right to know more already do.