In Soul Society, He Chose to Assassinate Yhwach.

The Battle of Karakura Town. Aizen fused with Honyu and evolved to a higher dimension. At this time, Li Yinhun came through and became Ichimaru Gin who was on the verge of death. "Silver! Thank you, I have finally become a being that transcends Death and Hollow!" Aizen has long flowing hair, carrying six wings behind his back, showing a strong posture, and his eyes are extremely indifferent. ... The Battle of Karakura Town is over. Aizen was sealed and sitting on a chair. Li Yin's face was calm, and his body was wrapped with a ghost seal. He also sat next to Aizen and accepted the trial in Room 46: "The verdict is announced below. The former captain of the fifth division, Aizen Sosuke, will be imprisoned in the depths of hell for 18,800 years." "Just because you are qualified to judge me?" Aizen's face was indifferent, with a mocking look on his lips, and there was no fear in his eyes. "Gin Ichimaru, you betrayed Soul Society, murdered the third seat of Division 5, participated in the Shinigami Hollow experiment, and been imprisoned in the Hell of Infinity for two thousand years." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.