EASY (IER) KANJI - JLPT 3 KYUU

It looks like an anvil or some heavy object on top of a heart [] When you do something bad, your conscience (should) weigh heavy on your heart
  1) aku, 2) waru(i) - bad, evil
悪者 warui mono - a bad fellow, someone (something) bad
最悪 sai aku - the worst
悪魔 aku ma - devil, demon