I'm about to drop it, don't use killer characters if your MC will not kill a single one while many characters will try to kill him...
She tried to fucking melt him!! How the fuck can you just let her be after she tried to kill you like that!?
Seriously, bad guys can do anything to kill the MC but the only thing the MC will do is punch them? And next time there will be bad guys who will not only try to kill the MC but his family/friends too while the MC will remain a pussy because he's not fit for this kind of story.
When will they understand that a nice character is not necessarily a good character...