>>521
The joke is that In Touhou 'Legacy of the Lunatic Kongdom', Hecatia the Goddess of Hell decided to help out her friend Junko (the lady with the Chinese dress in Tamamo's pic). Junko is a divine spirit who went insane with hatred after the moon goddess Chang'e's husband killed her son and after killing him, she devoted her existence to getting revenge on Chang'e. So Hecatia lent Junko her hell fairy Clownpiece for a full scale attack on the moon.

Lunarians are eternal godlike beings but therefore must keep themselved pure from all lifeforce or they get tainted and lose their immortality. Fairies on the other hand are manifestations of lifeforce and Lunarians' natural enemy they cannot counter. Clownpiece and her fairy army, powered up by Junko, wreak havoc on the moon just by playing there and the Lunarians decide to inavde earth with their moon rabbits, eradicate all life and move there instead. Now you gotta stop both the Lunarians and Junko and beat some sense into them.
https://en.touhouwiki.net/wiki/Legacy_of_Lunatic_Kingdom/Story

Even after defeated, Junko continues to plot her revenge angainst Chang'e, even a moon rover with her name on it would be good enough for some stress relief. But surprisiggly so far the rover is doing well.