Vilkas is normally the one to seem like the "blacksheep" of the family, but Adrian is actually more so. He's just some pacifist stoner-hippie, who's given up on society (both human and canid society) and being part of a family that is the polar opposite of anything he is, and just lives somewhere out in the woods in his little hippie camp. As opposed to Vilkas, who still finds himself caught up in their family's crap, despite being rejected by them.