Bruh, bladed hair weapons have been a thing for some time.

I know what you mean, but being more transformative, sci-fi/multi-tool type use hair blade/whip... to be more specific.

My main would use it for grappling as well, akin to Bionic Commando on top of Vania style whip attacks. Been studying the animations of Whip from KOF and her move sets. Want to incorporate those with sword and gun combos.
On hair, I don’t know why it defaults to a long ponytail. Could look better on fidelity mode. As is, a really badly done tressfx effect.
Main demo was fun but the boss with unlocked abilities sold me.
I thought the tech they use is pretty stunning; the way they have it wrap around her body; between her legs and such when you make quick turns.

But her head blade "ribbon"... I love it, but feel they could've done a bit more to make it more practical.. Like it transform into other various weapons, if it's going to be that articulate and versatile. (Maybe it will in the full game?) But that's just me being nitpicky.