Real Byakuren wants Youkais and Humans to live together peacefully, something hard to achieve considering that Youkais consider Humans as food. So I guess that Yukkuri Byakuren wants Yukkuris, Youkais and Humans to live together peacefully, something hard to achieve considering that: Youkais consider Humans as food, most Humans consider Yukkuris as food and most Yukkuris consider the former groups as slaves or as annoyances.
Actually, I think I saw some text stories on the Yukkuri Wiki with Byakuren in it. She's generally a nice yukkuri, but her crying attracts more Yukkuris to aid her against whatever antagonists she's facing.
I saw that one story. She's apparently filled with some sort of fancy cake that's worth money for some reason (like how Teruyos are somehow medicinal).
I would torture the ever-living daylights out of a Byakuren though.
There's one story, and that's not really much considering how many else there are with all the other yukkuris. It's not enough to come to a generalisation about how they are. So far though, the crying makes them a danger, seeing as it has the power to band yukkuris together (the result of which, made them hostile to humans on sight and ultimately human deaths).
Indeed. That's not how hunting is meant to work. Still, the fact they seemingly have the ability to seriously people mean they're a real threat to humans. Normal yukkuris are just pests, but these ones are more than that. Given humans are already pretty hostile to yukkuris in general, it doesn't bode well.