Dimitri for his part of things was glad to see Rose, even smiling when he saw her. He saw her startle and went to assure her it was okay. That is until she went to strike him. So the punch connected with his jaw, which he was now rubbing. "What was that for?"
He went to take hold of her hand to try and prevent another blow, confused as to what was going on. Welcome Dimitri and Rose to meeting up at different points in time.