I'm canonblind to Claire for the moment (I've been finally watching what I never saw of SPN thanks to Em) but! I'd love to figure something out for them if possible, Claude's also invested in found family and being a big brother figure where he can be especially since Claire also sounds a lot like one of his good friends from home. He also had to learn to let down some of his defense mechanisms so I'd be all working towards that as a theme with them too. Same goes for minor mischief, that's something that won't take much convincing to rope him into!