no proof. But the main reason is that Aizen took a part of the Soul King from Rangiku Gin wanted It back.
Aizen's cunning was unmatched in Soul Society. Assassinating him would require patience, deception, and complete loyalty—at least on the surface. If he exposed himself too soon, it would all be for nothing.
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
that is just Black Zetsu.
"Could there be deception at play? Especially since he flatly refused every opportunity I gave him to witness Kyōka Suigetsu's Shikai..."
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
because you did not manipulate you went straight for what you wanted, plus this is the guy that was surpressed by the nobles, It should be obvious If you come with one sided 'requests' he is going to ignore you.
"Why is this man so impossible to manipulate?"
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
"Would you be so kind as to inform Captain Akira… that Aizen Sōsuke, Captain of the 5th Division, has come to visit?"
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
well MC is getting more rewards Daily.
"I'm Zaraki Kenpachi—fight me!"
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
Oh he hates that.
Akira was behind him.
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
no wait? I think he only used his Bankai to flex on Renji.
It was well known that Byakuya Kuchiki's Senbonzakura was among the most powerful Shikai in Soul Society. Some Shinigami possessed only average Shikai, but Byakuya—having undergone training with Squad Zero—had honed his Zanpakutō to the point where its Shikai could rival a weaker Bankai.
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
challenge him for his captain seat.
"Therefore, not only will you be stripped of your rank, but you will also face disciplinary action for insubordination."
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
you can challenge him. One of the ways to Become a Captain is Beating the previous one in a challenge spectated by at least 200 Shinigami.
"Heh… Byakuya Kuchiki. I haven't even begun settling the score with you."
BLEACH: SURVIVAL SYSTEM
Anime & Comics · Shirokendama
The Initial Beast, the Qualifications of a Superior Demon (update)
In DxD Starting with Sign-Ing in as the Red Dragon
Anime & Comics · Roaaaa