Looking at imageboards, the popularity of the new UFO characters seems to go:
Byakuren Hiziri > Captain Murasa Minamitu > Nue Houjuu > Syou Toramaru
Of course, I could be wrong.
i just thought of something:
in the Prologue, Marisa says something about a UFO turning into a snake(and then a bird i think). does that mean that Nue's holding a Seed of the Unknown instead of an actual snake?
of course she might be holding one because Nues have snakes for tails.
and because having a snake wrap around a bigass trident is totally badass.
I can only assume that the form of Nue as we see now (meaning a loli)
is her true form because of this:
But now that you've seen me, I'll have to bury you
so I can go back to being an unknown.
I know that her ability is to 'hide her true form,' but that might refer to her possession of the Seed of Unknown Form, which allow her to hide the true form of anything. So, in Extra, Reimu, Marisa, and Sanae have seen her true form, which is the girl we're seeing now. This isn't necessarily right, but if somehow, the Nue we're seeing now is not her true form, then that would open up a lot of other interpretations of her.
Also, apparently, Nue was the midboss of Stages 4 and 6 (the blue light orb). Now, this means that she can use those seeds to hide her 'true form,' but sadly, from what I've seen, she can't control the appearance of the object the seed is attached to, as it is completely subjective from one's experience.