The gender of the spirit is as of yet unspecified, and therefore indiscernible. So where is the issue here?
I only recall being told that spirits "have no determined form or appearance", not that they were necessarily genderless.
Was this specifically mentioned in a previous chapter?
Are you being facetious, or is your brain atrophied to the point you can't even engage in the deductive reasoning of a toddler?
The spirit has had a neuter pronoun for the entirety of the manga, and the readers, as well as the characters, have known IT to be such from the very beginning. Humanity has been referring to animals with neuter pronouns since the very inception of the middle-english language, but now, more than 700 years later, it's apparently a confusing and contested concept.
Is it a dog, is she a dog, is he a dog?! I don't know, twitter help me, I am going insaaaaane!
All this neomarxist activism, revisionism, and the incessant attacks on language have left you chucklefucks utterly confused and cognitively incongruent. You can't even agree on objective reality anymore, let alone proper syntax.
Keep flailing and stumbling all over yourselves, I am genuinely curious when communication will finally completely break down under the weight of progressively more numerous ideological neologisms, euphemisms, and aphorisms.