[At least there's an apology, and one that Garrus is pretty sure the boy means. He nods with his mandibles drawn very close to his face as he checks the wound. Just a scrape, good.]

I know you didn't mean. It'll be all right. And this'll sting for a second.

[As he speaks, he's pulling out his waterskin to rinse out the wound.]

My name's Garrus. You're gonna meet a lot of people who don't look like you.

[And none of them are going to like being yelled at because of how they look. With that, Garrus carefully pours water over the scrape.]