When you create your user character, you have a choice between two classes - Warrior or Citizen.
Who are Warriors?
Warriors are just what the name implies. They're the heart of Goat City, since the majority of Roleplaying around here requires you to be able to fight. You'll fit in a little better if you choose this class.
If at any time a Warrior decides to retire from fighting or a Citizen decides to train hard and gain Ki abilities, it's totally possible.
For a Warrior switching to Citizen Class, just remove the Techniques and/or Transformations section(s) from your page and take the "Warrior Class" category off, replacing it with "Citizen Class".
For Citizen switching to Warrior, first mention that you want to switch on your character's talk page. An Admin will then help you by adding the proper techniques to your page and suggesting a martial arts teacher who can help you start out.