Helena 66KPP duck

I think she's actually standing if you can't low OH her. Then again, this character's design and her hurtboxes never were well thought out.

I'm assuming it has to do with hitbox properties from one or two frames and an extremely lucky (or unlucky, I guess) matter of positioning. There's quite a few moves that can crush mids if the distance is right, the stance (open or closed) is right, and the frames align perfectly. This looks like one of those cases.

If you pause it right Ein's fists are covering at least 70% of her body. Even Ayane can't move back like that.

Interesting.

While Helena was doing 66KPP, the third hit back-feinted your 6P+K and caused it to whiff.