i was able to defeat her over the weekend. i had been using the kusarigama as my main weapon, for the low stance low attack wheeling death combo. i use it on most normal enemies, it is like a lawnmower, you can just start it up, a few steps from the enemy even, and start spinning that metal death machine as you walk forward. what an attack.
but it was getting me killed in this boss fight. it is easy to get greedy while chopping up baddies like this. i switched to my 2nd most used weapon, the spear, grinded some decent gear from the surrounding enemies, and used that instead. it was a good idea to go for harder hits, and when i used the fire talisman, it took a lot of damage. spear has a nice reach so i was able to stay just out of melee range of her while poking now and again w the spear. mastering the bird attack and paralyze attack are necessary: just dodge right. getting the timing down is tough tho. and when she's in the air, just keep holding block, in case she throws knives at you.
now im at the next boss, a cool glowy tiger demon thingy. he doesn't seem to hard so i am taking a break to explore & find stuff. the level is a large rainy area w lots of big yokai demons to fight, which makes it fun for farming. level design is pretty decent, if visually still kind of samey, levels are sort of flat and one idea over and over. but i'm not complaining, that is most games, and the combat is fun, and the loot is sweet.