Two totally different characters. You're The Fool now.
So which one am I? Hehehe.
Jester
1. a person who is given to witticisms, jokes, and pranks.
2. a professional fool or clown, especially at a medieval court.
Joker
1. a person who jokes.
2. a person who thinks he or she is very funny; prankster.
3. a wise guy; wiseacre; smart aleck.