After the betrayal and treason committed by Aizen against the Soul Society for the sake of his own power and ambitions of becoming the new Soul King, Aizen would would leave to Hueco Mundo with his newly obtained Hogyoku to rule in place, as to form the plan needed to get him where he needed to be and have the Hogyoku eventually wake up and obtain the Ōken so Aizen would be able to enter the Soul King's Palace.

After some time, Aizen would find himself newly merged with the Hogyoku, granting him the power to manifest his will itself and to get stronger and stronger. He had battled some people on his way, but nobody really much of a challenge until... He find himself infront of the father of Ichigo, Isshin. The two of them would fight in the rubble of Katakura town until Aizen eventually grew stronger and became more one-sided. That would be when Urahara swooped in on the scene, the Soul Reaper's mind who is capable of matching His own, if not more. After some one on fighting with him, in which he evolved into his next stage with the Hogyoku. The two of them now taking Aizen on.

In the middle of getting pincered by them, Urahara and Isshin would hold one of Aizens legs and arm out with a Kido chain. Aizen would remain restrained, confused for a second before he sees the former Captain of the 2nd Division, Yoruichi Shihoin jump out in a sneak attack, what looks like to be wearing a special seat of gauntlets and boots and use her Hakuda skills to hammer him into the ground, a swirl of dust and rubble accumulating in the air. As the dust settles, he remain caved in against the ground, Yoruichi having a smirk of triumphant before Urahara eyes open wide and yells out.

"Yoruichi! Back away from them!"

He would yell out in caution before Aizen raised his hand and strike her leg, destroying one of her special boots before she can jump away unharmed, by Urahara side. Aizen would raise to his feet once again and look at them.