Players can level up their account and their individual characters by earning experience in the Garden. Every character will have their own level, based on the experience earned, and the account will have a global level.
These levels and their titles can be checked in the HUD of the Locker Room. Check the top right hand side to see your levels. Every character level will come with a title, based on the number of the rank.
For example: A level 1 Scavenger character will be called Aspirant, as A is the first letter of the alphabet.
This will go on to 26, then it will reset, but a prefix will be added to the title.
For example: A level 27 character level will be called Duo-Aspirant