Board Thread:Questions and Answers/@comment-27127950-20151027213016

Question, how long did Aizen rule over hueco mundo? I think there's a month or so (maybe more) between Aizen leaving the gotei 13 and going to hueco mundo, but during Nnoitra's flashback, Nel states they're looking for vasto lorde for Aizen, and we Nnoitra said Nel had been gone from the espada for years, so it doesn't add up. Was Aizen already ruling hueco mundo before Ichigo n co invaded gotei 13? Then how was he able to make modified arrancar, like Nel and Nnoitra, with the Hōgyoku still being sealed inside Rukia/ in kisuke's hands? I've only watched the anime, so it may be an anime-only thing, but please help. 