Per Steam page:

AI Generated Content Disclosure The developers describe how their game uses AI Generated Content like this:

Players can generate unique textures for character outfits and various items based on text input. They can also create 3D objects from image input, which can be used as interior decorations or accessories, and add distinctive motions to their Zoi using video input. Additionally, the actions and thoughts of Zois are controlled through sLM technology, enabling more engaging and intuitive interactions.