She's gonna likely be more upset with him later~

So after finding out that the crows are kinda peeved at him for giving those shards back, he's gonna find out that the crows believe that if Anna keeps hanging around, her realm is going to start invading the mundane world, flying glass and all. He'll be going back to her to tell her that and suggest that if she wants to keep her shards/stay alive, she'd best move back to the other side of things.