Icon wasn’t in the game i0 and you had one costume slot that you could change by rerolling.
i1 patch notes
Tailor
Now your costume can change and evolve with your hero. At 3 locations within Paragon City, you can update your outfit - for a price.
At levels 20, 30 and 40, you can earn extra costume slots by performing tasks for Icon's tailors. Now you can customize your look on a daily basis! You may perform these tasks at any level after the initial level.