Board Thread:General Discussion/@comment-4620155-20130410100635/@comment-4620155-20130410104722

No, there are noticeable differences with Aizen, Gin, Tosen, Byakuya, Sui Feng. Ukitake, Unohana, Yamamoto and Kyoraku are already quite old so they don't count. Urahara,Yoruichi and Tessai are in gigais and they look the same, so maybe it has something to do with their gigais.