User can kill anyone from their full name.

Pros:
-can't be traced back to user
-user can't kill animal
-user controls pain factor
-user will be calm in dangerous situations

Cons:
-death is chosen by user's emotions
-user must know full name to get their quirk to work properly
-user will be drawn to death

Weakness: fake names
User can only kill someone with their full, real, name.

This user will probably be pals with the grim reaper.