The retraction of those brilliant claws snatches Erik's attention away momentarily, and with this he seems to accept that the moment of hazard has passed. And so, just like that, he lowers his hand.

The way he looks right now, his tight expression, scowling eyebrows and all, it's not that he's angry, exactly—if asked to describe the feeling in a single word, he might call it frustration. He sincerely does not like that one of his own kind is unwilling even to give him a chance, purely on account of the reputation forged by someone who, arguably, is a completely different person. It upsets him. He's afraid, honestly, that this someone else is not a different person at all. Were this realization to come on his own terms, it might be different. He might even accept it. That all this has been thrust upon him, especially in the course of abduction, is strictly not okay; he rejects all of this in the most heartfelt way.
So, yes. He probably looks angry.

Quiet once again, still guarded, and now prepared to leave.