:getdown: Thanks! Uhm, I'm tempted to ask for the details. :ohdear:
Okay, so I searched through a lot of sources in various languages while trying to get the details straight, but I can't actually read Chinese so I could've easily messed something up? But basically:
There's two broad categories of legends and historical accounts about the archer Hou Yi. One is that he was an immortal man married to Chang'e, and shot down the ten suns. That's probably the one you're more familiar with. The other is that he was a regular man who usurped Prince Kui as the ruler of the Xia Dynasty. He took Kui's wife Xuan Qi (the "Dark Lady") and also killed the child she had with Kui (Bo Feng, known as the Feng Pig on account of being so gluttonous and lazy). Xuan Qi is also referred to in some accounts as Chun Hu ('pure fox'), which happens to be the exact same kanji as Junko's name. Xuan Qi (Chun Hu) later conspired with Hou Yi's minister to kill him. (There's also a tale about Hou Yi having an affair with a river spirit and shooting the monstrous river god she was married to, which angered his wife Chang'e. Which sort of parallels the usurper Hou Yi's narrative? Weird.) Apparently the various disparate tales are an issue even amongst real-world scholars; some sources claim that Chun Hu is a prototypical version of Chang'e, some claim that she started conflict with Chang'e in legend, some say that the usurper Hou Yi took the name of the legendary Hou Yi for himself, others say that the one story was a legend based on the real-world events of the other, etc. etc. etc. It's a bit of a mess.
So in short,
Junko is Xuan Qi-- not Xi He as I said earlier, whoops--
and her hatred of Chang'e stems from these two different tales of Hou Yi being conflated with each other. (I... think. If anyone who can, uh, actually read Chinese wouldn't mind looking into this and possibly correcting me, it'd be nice.)
In the ending illustration,
Would it be bad if I posted a link to a screenshot of it? Not the full illustration, mind, just the one part.