Jump over her sweep attack is the key, deal big damage posture to her.

I bought Sekiro on release, I always play my first run of a fromsoftware game without any spoiler and because I played too much dark soul I was playing using only attack and dodge, ignoring posture and just chipping at vitality. This boss was the moment this method stopped working, after countless death I couldn't even take the one deathblow against her or the corrupted monk, ended up wasting all my confetti then put the game on hold for months in frustration. I kept reading online that you have to use deflect and playing Sekiro like a soul game make it harder so I gave this fight another shot yesterday and killed her in less than 15 try. Spam those deflect people !

So, replaying this and reaching O'Rin today, I found that merely approaching her from the side- either side- before talking to or provoking her allowed for a free deathblow. Moving directly behind her, the prompt reverted back to dialogue. I spent a long time just circling her to make sure of the consistancy of this. It also took me two attempts to kill her and I was able to do the same thing both times, starting the fight with one free deathblow just for walking up along her side. No ceramic shard needed. Nothing. Anyone else?

She has massive posture in NG+4 when you have only 14 attack power. And charmless/demon bell, a deflecting-focused strategy just doesn't work for me. Sabimaru poison? Yes but 10 of them for just a half of her health. Then you cant chip his vitality, or only after spacing her. Because, despite what is written in this wiki, you can rarely punish her after a good deflection… At this state, the most difficult enemy in the game for me.

Floating passage and divine confetti... Don't stop performing the skill, she'll be dead in a matter of seconds

I'm surprised to hear that so many people had a lot of trouble with her. I had to try more than once, but I think I killed her on like my fourth try or so? She wasn't substantially more difficult than the average mini-boss up until that point IMO.

Had an easy time with her... just use mortal draw an decimate Her life bars. She only hit me 4-5 times with her vanishing thrust. But you can side step that pretty easily with the right timing.

She gave me so much trouble before I remembered the description for Sabimaru. Decimated her after that. I was also at the endgame by then, so....might have had something to do with it.

Really 1/2 my hp in one hit while attacking ~50x a secound plus doing insane stamina damage

This game feels like you have to buy a luxury car with the change jar but then you do buy the car with the change jar.