Canons have fixed stats, meaning xp is useless to them. A canon characters grid and items are decided upon by the admins and then given to the player to put on the app.
You may think you don't have to write a history for canon characters, but you actually do. It gives us a idea of how you will interpret the character and is required, though it doesn't need to be as long as an original characters.
A canon character grids will be anywhere from 28 to 36 points and may be updated as the characters powers/abilities progress in the shows.
Taken Canons:
The Flash -red