User blog comment:B214/Volume 22 spoilers/@comment-24075086-20170327204257/@comment-30924344-20170328075849

@Phantasys The other Team Member chapter has not been summarised yet, but that is the chapter that reveals Grayfia as Bina because if the first Team Member chapter was about Duilio's Team, then that one is about Issei's as only one match was focused on which was theirs. My friend Crimson and Darkness talks to the translator Code directly in PC and I asked him if Code confirmed Bina is Grayfia and he said yes.