User blog comment:Xilinoc/Ch. 534 Everything but the Rain op. 7 - "Hole of Reproach"/@comment-7606564-20130418010722/@comment-5198194-20130418013220

Well in Kubo's defense, Aizen implied that he created White, and even if not, he had a lot to do with White, and one of Aizen's goals has always been to find a way to break borders between races (and Aizen's been blurring and mixing racial differences for nearly ever -- Arrancar, Visored, etc.).