Inwardly he wants to sigh in relief, but he's not letting his guard down around this man, ever. Cal nods back though, the thanks unexpected. They'll probably never be friends, but they don't have to be enemies either. At least, he'd rather hope they don't.

"I'll be back with the rest," he says, turning then. Behind him, BD-1 glances back at Wesker, content to keep an eye on him at least until they've gotten a little further away.