User blog comment:Xilinoc/Ch. 543 - Letters/@comment-11293956-20130626185134/@comment-5657895-20130626213803

That shouldn't change the fact that he's still a pure blood. Who knows, maybe he's aware that Ryuken abandoned the old Quincy ways and doesn't want to be a part of it anymore. Yhwach is capable of mercy at times, it's been shown.