Master and Disciple in the Darkness

Under the influence of Urozakuro's ability, the seals over Aizen's left eye, left ear, and mouth were undone one after another, revealing the smile that had once struck fear into the hearts of Seireitei.

"So this is what Muken looks like. It's rather shabby, isn't it?" Aizen looked down at Soya Azashiro, who stood beneath the pillar sealing him, and said with a smile, "Thank you for releasing my seals. You must be Soya Azashiro, correct?"

A trace of suspicion flickered in Azashiro's eyes. "Hm? You know me?"

"According to the records of the Great Spirit Book Corridor, the only one capable of breaking the seals on me in such a short time is your Urozakuro..."