Nao-chan is a mix of tsuneyo in skin tone, yumi hair, and curiously wizard.
Now, one of the eyes 1 is definitely Maya, while the second one everyone is quickly settling on Ami, it could be, although I'm more inclined to Sekai, because of the monologue in her appearance.
+ Kaori herself being a receptacle for Sekai right now, and Nao-chan is already very connected to ami.
1.Tsuneyo=Calm/Wires
2.Yumi=Who one of the gods knows her by another name. + special in resets, Kaori's cousin by the way.
3.Wizard=It is not arbitrary that this being has chosen this form. something plans. or is it a kind of bait.
4. Maya, not much to say
5. Sekai,
6. Kaori.
7. Ami
8. Nao-chan and everything behind it. -->Library and Wishing Well
9. Old One and all these kinds of creatures
+ The extra of why she is mute that may also play another role later on.
So Nao-chan right now encompasses 9 very important things in the meta-narrative. or even a little more depending on what we see.
By the way, the number 9 reminds me of the desk of the ninth god, and since the 4th chapter, they have been introducing new gods starting with Gossamer, then Onand and the creature that Nao drew knows another god, so everything is also connected by that part.