Look, all he knows how to do is kill things and offer to kill things. He's not really good at showing he cares in any other way, mostly because he's still not used to caring. In the end, he trusts Geralt -- he's been shown no reason not to. If anything, he's proven himself to be reliable and capable and that's good enough for Berserker.

As Waver drinks the concoction, he gets a sideways glance.

"If you puke on me, I'm leaving you here."

He's still not good at this whole sympathy thing, okay?