Wow ,really sounds depressing when you think about it. Imagine all the events from the 1st to the 5th game were just her trying to deal with social anxiety and loneliness by projecting imaginary friends (Mochi, Moxie), just to fell like she is accepted by someone and to deal with her being discriminated. Damn now I feel sad.
By the way, if you like idea about a lonely person who makes up imaginary friends, then consider playing game "Imaginary friends", https://mannytsu.itch.io/imaginary-friends