We have already pointed out that the difference between the version for supporters of the game and the public version is like the difference between an early beta version and a stable version.
Hairstyles are not mandatory in the passage, so this issue is discussed in more detail in Discord.
But the point is that some ghosts can become so impudent that they want to make Celica's body more similar to their former body.
This is what the parameter is for, which shows the level of possession of the body by a particular spirit; some things related to Kimiko may also be useful.