Sekibanki stretching her neck like a traditional rokurokubi is actually a pretty rare sight.

InsomniacCat said:

Sekibanki stretching her neck like a traditional rokurokubi is actually a pretty rare sight.

And it looks pretty damn cool, ngl.

Dancing_Menreiki said:

And it looks pretty damn cool, ngl.

Yeah, it is.
I'm pretty sure she did it once in the game as one of her spell cards, and it's just her using some blue orbs to appear like she's stretching her neck.