Some speculations about Nodoka’s “influencers”
Can the lavender person be Futaba?
Point:
old friend and forever love of hers, not lavender-colored hair but lavender scented perfume (I mean I really can't tell what hair color Fubuta has), repopulate book shelves like a librarian, busy saving someone else as a selfless person she was and is
Counterpoint:
the name Yuko; even if Nodoka has the tendency of changing the name, the change isn’t that major if the trend followed through (but I doubt Yuko is this person's real name regardless)
Futaba is basically too low on any sort of trippy-ness from herself other than perhaps Clam's Tongue
It's a stretch; but with Nodoka describing herself:
- using a potentially fictionally modifed version
- using a third person POV
- and with how things are always trippy and unexplainable to her the entire time, it's just too hard to land on a solid answer
Other more obvious influencers to her are Akira and Sekai; there is no way that she hasn't read any of their creations, but it's now she knows Sensei IS Akira. Maybe she found the "something isn't right" feeling from their works resonated with hers.
Also at this point I believe the published upside down house story is basically one of her creations (which also got movie adaptation, but she apparently is renowned enough). It's creepy but at the end of the day it's a human-made piece of creation, perhaps telling whatever past she experienced via the hyper-perceptive senses she has.