The Joker

The Joker was Batman's deadliest arch-enemy who was ruthless, cunning and extremely dangerous. He tried every despicable trick to take over Gotham City, make a profit and ruin Batman's life emotionally and physically. The Clown Prince of Crime had no pity for anyone he forced to take part in his nefarious schemes either by blackmail or deception and was especially unkind to his sidekick and love interest Harley Quinn, such as manipulating her to amuse himself. He also escaped death several times after his defeats with Batman, until his final eventual death many years later.