They just look different for no reason
A different kind of human or race
Monsters or demons
I believe that Kaguya is an extra-terrestrial (most likely from the moon) and Hagoromo is an E.T. - human hybrid.
They'll probably just leave the readers with the impression that they're humans.....maybe part of a divergent race of humans.
They are ...rabbits!
I think they are people from the chakra dimension. Similar to frog dimension, snake dimension, slug dimension, there exist another dimension which we will now call chakra dimension since kaguya and hogomaru originally didnt have chakra. (naming it chakra dimension doesnt make sense. I know. But who cares?)
They are just a different race from a longtime ago - May just more spiritually advanced!
Omgggggg I just found philosophy/matrix references!!!!!!!!
Rabbit goddess = rabbit hole like the whole quote about going down the rabbit hole...philosophy type th:ng.
God tree = price of a prrfect world is some plant that drains ur energy at the same time making the person believe they are in their happiest place.
They're cosplayers. They always were.
Kaguya reminds me of Jenova, Sephiroth's mom.
She may really be a different race from another world / planet.