Invent a background story for your character, beginning with the Naruto village where he was raised. You can create a dramatic character who wants to avenge the death of his clan, or a happy character such as a traveling medical ninja trying to help the world. Be original and find something that has not been done in the show.
Design your character's looks and personality. Make him big or small with any color hair you choose. Select his outfit. Then you can concentrate on his personality traits and likes and dislikes.
Outfit him with weapons if you like. Determine the "jutsu" he will use and whether he inherited any abilities from his clan. For instance, if your character hails from the Uchiha clan, he will inherit "sharingan"–the special ability to see a technique once and memorize it forever.
Decide how you want to use your character. You can role play, make a "doujinshi" or even try to see if the Naruto creators are interested in using your creation. Send your e-mail to "[email protected]." Whatever you do, the important thing is to have fun.