User blog comment:Xilinoc/Ch. 552 - The Fundamental Virulence/@comment-5606268-20131009163537/@comment-10630156-20131010074320

Maybe he'll throw one down out of rage for what BG9 did to his sister. Sometimes when people are given trauma like that from enemies they do something that surprises everyone just because they where angry as hell. I got to admit if someone learned Bankai like that it'd be awesome for character development and the like (even if it was Omaeda).

Ragekai?

I imagine Sui Feng's just dodging all the blows she can for now. 99.999999% more likely that Sui Feng will regain her bankai