>>21043400Roomie-chan was created by Enna in time of immense stress while coping with her failure to look for a place to live, which ends with her getting monetary help from her dad.
Roomie-chan is everything Enna ever wanted from a friend, and also someone who willingly saved her from going homeless. She deluded herself into thinking that she was saved by Roomie-chan, even Roomie-chan's whole family is just an extended part of Enna's tulpa.
All these years, Enna has been living alone while thinking that she is living with one of her best friends.
Enna moving out with Roomie-chan from her "parents" house? That was just her moving to a different place. Her talks about visiting Roomie-chan's parents? That's just her going to her old apartment, which is still empty till this day.