You maybe have to create a character, but there are some rules that you have to fallow.
Character rules:
1-You cannot create a character that is invincible. He/she must have to be able to be killed and should not be too hard to be able to hurt him/her during battles (Fake ones, lol)
2-No characters are stronger than everyone. Everyone is supposed to be equal to everyone, but you can always make your character weaker than other people or even if your character is really strong, you must have weaknesses that are easy to find.
3-Always act as your character in all times with other people participating, unless you want 5 minutes to be "normal".
General rules:
1-Respect everyone (when you're not roleplaying; and when you roleplay, don't exagerate)
2-No "Real" Violence. (No hitting or hurting people!)