User blog comment:Sicarius001/Royal Guard and Eighth Division Captain/@comment-5775318-20130419053929

this is just a thought, but look at Senjumaru Shutara's title, in fact lets look at all the known titles of the royal guard, each have somthing to do with what they made, the healing springs, Artificial soul, and Zanpakuto, and going from that if we look at Senjumaru Shutara's title, "Great Weave Guard" it might imply that she made the Shihakushō, or somthing like that. and in regard to the Captaincy of the 4th and 8th Divisions, 4th would have to be a Healer of greater of equal skill to Unohana, Isane, and the whole division, so it could be that Isane could take the seat. another theory is that the 2 captain seats could be taken by the 2, as of yet unknown Great Noble Clans. seeing that they never went in depth about them and they are supposed to be like byakuya and yoruichi's clans and be highly powerful in regards to Spiritual power.