@Eviltwinq especially if he want to continue living a human life, he should avoid using a foreign power in a "peaceful world". Being slightly different would already caused some sort of isolation, but if the difference was that big, He will be treated like god by some, demons to others...
@beperov I don't think he would let someone get rape or killed, He was simply avoiding using his power as much as possible when it wasn't necessary.Sure he looks like a heartless bastard because he was simply watching, but im pretty sure he was only that calm because he have the full control over the situation. Because if he use that power carelessly more people would only get hurt..The hero thingy title doesn't turn him into a saint like good samaritan who will help every single person in need, it was a title to the human who will save the world from the demon king...
Be grateful when someone helps you because helping others is a choice,not a freakin job everyone forced to do.