"Anima" can mean a few things, but its meaning orbits around an association with the unconscious/inner self of a person.

I got my primary inspiration from Entwined, a beautiful rhythm game developed by PixelOpus. But I wondered if, instead of being given existing forms with an existing story, the player directed the form of the avatar. I got to wondering if it might be fun if you were tasked with hitting a selection of many different colours, perhaps presented like notes on a musical score sheet. The game would be similarly "mystic" with an ambient soundtrack but you start as a formless white light, and each different colour/note you select influences aspects of the fantastical animalistic form that you generate over the course of the game. With a potential for that form to then complete a second half of the game, so hopefully your anima doesn't end up too dissonant and inept.