1. You will find nora in the school gym locker before class start you need to go there everday if you want her to como in the dungeon
2.Go on you game folder search for the save folder an paste in an older save, for me sometimes some games dosent paste all stats
3. Nora will help with some stats, but if you want to grind complete the ghost girl quest then when you used the mirror in the apartment you will get more stats fromthe gym