Class Change is one of the systems featured in Tokyo Mirage Sessions ♯FE.
Like in Fire Emblem, items called “Master Seals” are used to advance a Mirage from one class to another, such as the example shown with Caeda and her promotion from Pegasus Knight to Falcon Knight. Advancement grants Mirages new attacks to use, and changes their combat attributes.
The player is given a choice of promotion options when a Master Seal is used. Caeda, for example, can become either a Falcon Knight or a Dracoknight, with each option providing its own benefits. Class Changes are performed at the Bloom Palace with Tiki's aid.