[He smiles a little. It comes so naturally to do that that he doesn't really think about how it might come across to others. He should probably be a little more careful there...]

I healed you. Or I would have if there had been poison but there wasn't. It's called a spirit arte. It's an ability from my world that humans can use. [Well, certain humans but let's not get into that.]

Sorry, I didn't mean to startle you with it.