I don't care what Varric thinks, I would die for Milo
nah, Varric will like him fine. But there will be jokes about how much they could sell a good goat stew for. All his nicknames will be receipe related.

I think their relationship would prooobably hinge on how their CR starts. It could be anything from Varric being frustrated as hell at Kaz's very existence to being constantly worried about him and his wellbeing to my very favourite possibility: both.

Either way there's got to be shenanigans.