From Turf Battles Wiki

There are several ways to Customize your character when molding them into a fighting force through the levels. Different looks, different stat builds all can be completely unique to the player's choice. Fortunately, in Turf Battles, everything once created can be redone infinitely over to suit the player's needs. Your appearance can be changed to a certain extent although not race, class or gender. However your stats can be completely changed around excepting your base attributes unique to your class. If all else fails, remember you can always make a new character and try again.

Use this wiki and the information there-in to guide you on creating your character, but don't let it stop you from expanding and experimenting with your character and perhaps creating a uniquely powerful legend.