What I dont get is, she behaves like a little kid since the beginning but remembered her past live as a 23 year old college student. Was she this childish in her past live or did the autor completely forget the setting he set at the beginning.
@TetsuyaLP It's because her past life doesn't have any relevance. She's 23 spiritually but still, mentally and physically a child. She's just at that age where she doesn't want to be treated as a child while remembering she'd been at that age before.
I think, also, it implied he past life was kind of a movie to her. They were comforting, distracting images, but not who she was or what she was living - and who she is, currently, is a child.