Hey, thank you for giving my game a spin even though you haven't played many visual novels before! I'm glad you liked the experience. That must have been a weird intro to visual novels.
I made the demon's facial expressions extra subtle due to their personality. They've kept their emotions buried for many many years and it's going to take some time and effort to thaw them out. :)
You know, during development I did toy with the idea of having the demon be a figment of the protagonist's imagination, but that thought was brief as it felt a bit too dark for me. I also thought about making it so that the demon is real, but for whatever reason only the protagonist can see them, and the friend character can't. That would have made it so that the friend literally can't see the protagonist's struggles. In the end I went with the simplest option which was "the demon can be as visible or invisible as they want," haha. That was the easiest way for me to tell the story I wanted: the friend can see the protagonist's struggles, she just doesn't want to deal with them.
Thank you so much for the comment!