Aria is going down a dangerous path lol, in terms of ecchi fan-service the anime is doing better than the manga, the fight against that demon was ok but the outcome brought consequences for Aria and to save her the protagonist is willing to do anything
also, maybe I didn’t pay close attention, but... their group doesn’t have a healer, right? They kind of need one.
Poor guy, he's still at a low level. What saved him in the fight was his team comp, unfortunately. He should go farm more XP to fix this problem.