People say that Buck is so similar to Dean but I don’t think they realize how many parallels there are between Dean and Eddie, with them having to learn how to handle their temperament and trauma and all of the several years of conditioning they’ve both suffered from. Buck is really actually closer to Castiel because of how many times he’s watched over Eddie and protected the things Eddie loves, leading him to the right path, being that guardian for him. Whereas Eddie is the humanity, and the light for Buck. Eddie is afraid to explore that side of him, much like Dean, whereas Castiel and Buck know what they want. They balance each out so much, and at the end of the day they’re just another variant.