Of course I do. Naagloshii are messengers [ or their descedants ] of North American gods. The territory part comes with the mythology. They are most definitely not Outsiders. Fomors are insiders too. So are various other demons and deities.
If you think otherwise, maybe re-read the books again...?
Maybe hold the snark before I show you how it's done...?
Nemesis used to be a Greek Goddess. Now she's not, now she's what GK watches for at the gates. Yea, yea, Nemesis isn't... but she is, reread what Titania told Harry and why that would be, it's okay to call it The Adversary but Not Nemesis as, it will attract it's attention. The only known mechanism that works precisely that way is Naming things(heck we have a literal Greek example in Hades, who wears Mordite on his crown). No reason to make up a whole new mechanism when a known effect is applicable, nor would it necessarily be a stronger case..
Which would naturally lead to the rebuttal that Hades is part of reality, his spirit is true, in so much as it's still attached to it's original human memory of him.
Then we have MS's comment to MW that it's not 'her' world. The comparison of MW as the longest shadow and Lucifer as the deepest, the fact though both those things exist in human memory they are in fact both simply reflections of direct inside universe immortals. Lucifer in particular here, because in SmF his power is described as the anti version of what TWC promotes, the idea of freedom. This is not directly from any biblical sourcing I know of, this is his own spin and ergo directly relevant. Hell, even Mab is actually just the shadow of Titania, even though she has more purchase inside reality than any demon of an active religion as a story book character...
Moral of that rant is the division between 'outsider' and insider isn't so clear, and indeed Shaggy and co all have the same vein of negative attributions as Outsiders and even Blamps, who exist inside but are apparently effected heavily by Necromancy and the power of NOT.
Also, comparing Angels to Ghosts(as is obliquely done in GS) they scale to the same set of choices to make the same relevant change in reply. Angels can stay out of it and do only what they are meant to or they Fall. Ghosts can respect that same veil between the NN and reality or they too go completely batshit from it. Though the effects are different the causality is actually quite similar if not the same. Almost everything can be applied to this model I think..