Board Thread:General Discussion/@comment-26475399-20150621155415/@comment-11269545-20150720065732

Rockyprince wrote: My theory is Ishin, zaraki and Aizen maybe Kisuke are all decedent of soul king and most likely not from Yhwach side.

that will explain over the top strength of theirs Zaraki is probably an anomaly considering he's from the Rukongai meaning he was once a living human