amazing game so far, love it. But i'm super confused why MC is getting blamed for what happens to rosaria. doesn't make any sense. in fact i'd say harper is more at fault considering she was with rosaria and let her go off on her own. Also why was mc able to easily kill all the vampires in the beggining of the game, then after he gets a power upgrade he gets his ass beat by a couple freshly made vamps? the power scaling is all over the place
As Zariel explained, the seal functioned as a pact and provided magic to the main character, but with the seal's gone, the pact no longer exists, meaning the magic is gone too.
Moving on to the other part, Harper got annoyed that the main character always acted impulsively on his own without telling anyone else.