User blog comment:Blankslate/My top ten favorite Espada releases/@comment-3030647-20121223033818

Personally, I don't think Ulquiorra sealed his powers "twice". I mean, if you've heard Void's theories, it's unknown if Ulquiorra actually was a hollow, since he was born as a Vasto Lorde, or a being reminiscent of that. So...perhaps he's something...of a transcendent? Maybe his powers are sealed into a Second Form to show that he is not simply an "Arrancar" but emphasized true "Emptiness". I mean, his power was pretty much on-par with Aizen's Post-Chrysallis Stage, so...yeah. XD That's my thought.