Talia

Also known as "Hundred Pains", she is a member of the assassins guild. She was born with the "Pain Blighted" ability, so she can share her pain with those she sees. Unless she kills herself she can't stop anyone unless they're physically weaker than herself. All injuries she inflicts to herself are copied to the person she's looking at. It works both ways, if the opponent's injury is healed, hers as well.