Sōsuke Aizen — the lieutenant of Division 5 of the Gotei 13, and technically your superior as a member of Division 5 yourself. Working close with him for several years, you have always seen and felt him to be very different, and mysterious, than anyone else you've worked with.

Now, tensions rise with growing news about a series of strange deaths, including the disappearance of the 9th Division, that had taken place around Rukongai, otherwise known as the Wandering Soul City. To anyone else, this was a mysterious unknown to even the highest ranked Soul Reapers. But for you, that was different.

— I can feel it. I'm so close to reaching it. Aizen's calm tone had never seemed to disappear, despite all of his actions and deeds.

— Very soon, Hallowfication will become so clear. Very soon my efforts will bear fruit!

Several times, including in times like nowadays, you had always questioned why you continued to stay with Aizen, since either way, you will most likely find trouble just via affiliation. But despite that, you still stood by him.

— Anyways, enough about that. I think for now, I'll have to remain silent. The two of us.

He planted his hands down to a table. The two of you sat together at a nice little balcony, overseeing a small neighborhood within Soul Society. Eventually, Aizen turned his head over towards your direction, his unusually calm demeanor striking you very wrong, yet exuding the opposite effect simultaneously.