Aizen knows that the Soul King hand with Ukitake in Bleach OG Episode 62 Aizen said to Ukitake no one stood at the top from the beginning Neither you nor me nor The gods great foreshadowing And the Bleach tybw episode 25 after the ending song Ukitake said Zero Division allowed the royal palace to be invaded and the Kamikake was in anticipation of that This was the first time we saw the Right Arm of the Soul King