It'll probably be their luck to be partnered up on a long assignment.
Asher's probably fairly oblivious, almost always sits by himself, absorbed in something or other, not really paying attention to anyone else. He's very much a geeky nerd who assumes no one wants to be around him, so he spends most of his time alone, unless Jacob is convincing him to get up to some shenanigans.
And that's a good question, about the silver... I keep forgetting it's supposed to be something werewolves are sensitive to. Maybe they're allergic to it?