She was banished from the moon, so I'd imagine that they could bond over being wronged by Lunarian authority.
(Also, Lunarians consider fairies impure because the can die, yet banished Kaguya for becoming immortal?)
They banished Kaguya for becoming unnaturally immortal.
Purity is kind of a big deal for them, which is why Clownpiece's presence on the moon as a being of pure life force was such a major threat that they had to evacuate; and why Youmu and Yuyuko were able to walk around the Lunar Capital without being given a second look from the residents, as if they had always been there.
There's a saying, that there is a fine line between love and hate.
What's with this person,
scary...The pitifully frightened look of yours is the best.Or,or is it...Could it be that it's the work of this silky black hair?Aaah Chang'e...WHAT THE HELL!?There is no use talking out of this!!Kukuku... The thought of finally getting to unleash my wrath upon you after all these years sure made me excited, Chang'e...Why did my husband fall for a woman like this...That's not Chang'e-san...At last we meet each other again in 4000 years!!Or...Geez, I do not understand...Now I shall have you ripped to shreds!!Chang'e!!!could it be that it is those lips of yours which make one want to gain hold of them without thinking?