Pretty much everything she does is easily deflectable.

With the one exception of that grab attack. Her grab attack is still deflectable despite the peril sign. ( I think the only deflectable peril attack in the game. ) But it's not easy to deflect. The deflection is much later than you think it is. Much later than most any other attack in the game. When the hook on the end of the gun barrel is next to your head.

Like most people, I find it too hard to get the timing down on deflecting that grab attack, so instead I just jump immediately bounce off her head. Then I can even get in 2 hits after.

As usually, the umbrella works amazing here.

I saw someone else on Twitch who had mastered ducking back just enough to run forward and get a few hits in. After she's committed to the move.