Violent, aggressive, bloodthirsty, traitorous, deceptive, manipulative, disturbed, deranged, ambiguous, hidden, unpredictable, selfish, insane, charming, heartless, sociopathic, dramatic, unforgiving, evil, psychopathic, vengeful A character who acts or seems sweet on the outside but is actually full of bad feelings, like grudges, towards others or even their love interest.