It's inevitable, of course, that his sister would meet people here. It's not exactly void of people, and he's met some decent ones himself. He can't expect her to lock herself in her room the whole time they're stuck here, though he also doesn't want her interacting with flirty men who could easily hurt or take advantage of her.

Of course, he's jumping to a lot of conclusions here, and he stops himself abruptly.

"She's my little sister," he tells him, crossing his arms over his chest. "How well do you know her?"