User blog comment:Zwann/Vasto Lordes in the Espada, let's analyze./@comment-1584449-20091016180640

i think that Ulquiorra's second release may have somthing to do with him posibly being a Vasto Lorde. or maybe what aizen said about gatering the vasto lorde to complet the ten member espata means that some of the current espata are vasto lorde(ex.starrk,barragan) while the rest were like stand ins(ex.Harribel,Nnoitra) untill aizen could get more of them in his army.