The character is the perfect psychopath, and his evolution since his creation can allow the costume wearer to play the character in either a wacky or extremely creepy sort of way. The character can be paired with several other characters as a perfect match. Not only can the character be partnered alongside a different version of the character (this works especially well when done with a Nicholson/Ledger variant duo), his lover, Harley Quinn, or his arch-rival, Batman. See the article on The Joker on Fandom's Batman wiki.