I think Nodoka actually meant "Nothing" more in the poor sense. Like she grew up poor with a disabled mother, with virtually nothing really to her name. It's probably why she's so protective, independent, and deliberate, and has no remorse for Yumi just because she's "had it rough".
She likely even became as smart as she is, out of necessity.
Nodoka also seems to be one of the few girls who don't have someone taking care of them. Then again, could be wrong. Can't recall if she's mentioned having a father in her life.
Chika and Nodoka are rather similar now that I think about it.
It's from Nodoka's: Amoeba (Incrontrovertible Peculiarity)
Akira "As in...you were poor?"
Nodoka "Perhaps it’s better if I don’t attempt to explain things at all. It’ll only make me appear insane."
Maybe it's her insane way to describe growing up poor.
But maybe she's pointing to something different.
Espacially with the:
Nodoka "What if someone has been somewhere else but everyone thinks they’re crazy and no one believes them because the idea of another world layered on top of this one is absurd? It’s insane. It’s impossible."
Maybe Nodoka has a mother in Kumonmi, a life, some conections.
But maybe Nodoka comes from the Upside Down House. Maybe a few of Kumonmi inhabitants do.
And Nodoka feels a connection to that place, and remembers it.
The Upside Down House is said to be on the edge of the universe, what ever universe means in that context (could just be Kumonmi).
And that could also mean that it's on top of it, or, that Kumonmi originates from the Upside Down House.
Maybe it really is a game, played by the inhabitants of the Upside Down House, and everyone wants the story to go their way, hence the "gods".
And some got lost in the story, like for example Nodoka (who might be in fact, Nozomu).
It would really be some badass 4th wall breaking everything considered.
But i think it could fit.
I'd rather have explained that train of thought seperatly, but it is as it is.