[Garrus eyes her, wondering if he's being teased. After a moment, he decides he doesn't think Xion would have a good poker face and this looks pretty convincing.]

No. Not a pirate. We went after some pirates. I serve on a space ship.

[Which, he realizes a moment after the words are out of his mouth, might not make sense to her.]

Star travel. Not a flying wooden boat, it's metal.