Step 1: First, あなた will need to have the status of your character. Tell the information about him/her. The things あなた will need to tell are:
And so on.
Step 2: Second, あなた need to tell your character's story. What happened in your character's past? What do あなた think will happen in his/her future?
Step 3: Third, あなた need to come up with a デザイン for your character. If あなた are not really an artist, get someone else to draw your character for you.
Step 4: Lastly, be creative. Give your character special powers, so they can fight. Also, あなた can give your character weapons and vehicles, such as, guns, swords, vans, motorcycles, and any other thing あなた can think of.
Well, that's how あなた make a ファン character! Have fun! Bye for now!