User blog comment:Lia Schiffer/405: Deicide 7/@comment-44061-20100531200127

There was never any mention of the Vasto Lorde but twice in the series once during Hitsugaya's explanation of the different levels of menos -class hollows and once with a small conversation between Aizen and Gin about looking for them. It was never said by anyone whether or not any of the Espada where Vasto Lorde and considering that they are by and large dead now it really doesn't matter. But yes you completely misunderstood their role or lack of one in the series. As they have never been stated to be any character so far and they have never been claimed to be more powerful than anyone other than an average shinigami captain. Anything else is baseless speculation. Also Aizen didn't defeat Yamamoto (no one did in fact, he took himself out the fight, presumably). Other then that im not sure what your saying about Aizen.