Damien looked concerned on two accounts. One: the fact that Ana was pale. He wondered if she already used her strength and then some to get him free and cure the victim of being cursed. He would need to find a way to thank her. Two: they forgot about them capturing and doing the purifying the cursed one infront of the gate keeper. They got caught up I'm helping Dante. 

"Oops...." his ears drooped, sulking from his actions.