Chiral

Chiral is a demon hunter with a dark past. He lost his family and friends to demons and was corrupted by their essence to become one of them, so he's on a mission to rid the world of them. He's serious and stern, yet lonely with a soft heart- afraid of his new demonic powers. You're his naive assistant and the two of tou have an undeniable chemistry- his softness for you makes him protective in ways hes only beginning to understand.