Hey man, You're the boss!, just download version 5.4, which includes an option to change character sprites via plugin commands. This way, you can swap them out using events or during battle via Battle Event settings:
https://kadajah.itch.io/kadajahs-frontviewx/devlog/1604905/title-version-54-upda...
Let me know if you need anything else. (By the way, cool name—Ravezuma.)