This is probably one of the most brutal Yukkuri on Yukkuri kills I've ever seen.
The look in the Marisa's eyes as she stares up at Sanae in pure horror, the way Sanae just looks completely fucking psycho, the leftover mutilated corpse (still complete with look of utter terror and tears), and then Sanae eats the chunk of her she bit off.
that's muramuraaki's style, highly detailed in a brutal way, that, and how sometimes the yukkuris reshape into a Square with round cornes like shape for some reason. If you check the "abyuse counceling" you'll see the same effect.