Champions grow in strength via upgrading. You may access the LEVEL UP menu by navigating to the Champion overview by:
- Tapping on your Champion at the home screen
- Tapping the UPGRADE button on the home screen
Once in the Champion overview, tap the 
icon in order to proceed to the LEVEL UP menu.
Champions have ranks and levels. Ranks contain levels, and levels are achieved through upgrading. With every step in progression, your Champions will grow stronger with the use of ISO-9.
Tapping the LEVEL UP button will use the appropriate amount of ISO-9 needed to progress to the next level, as displayed under the level progression bar. The benefits and progression for the next level can be viewed on the right-hand side of the screen.
Once all of the levels in the rank have been achieved, specific upgrade materials will be needed to rank up in order to strengthen your Champion even further. Rank-up requirements can be viewed by tapping the appropriate rank window.
Catalysts and other materials currently in your possession may be viewed in your inventory. For more information, please read the Inventory & Stash article.