What if Byakuya lets Rukia join the fifth division?
Aizen looked at Byakuya's weak point, Rukia, and thought: It's so troublesome, but not accepting it will be even more troublesome.
Aizen looked at Rukia, who was addicted to Kidō, and thought to herself: The talent is good, and it seems interesting to watch the people he trained fighting swords with him.
Aizen looked at Rukia who had become his wife and thought: It's time to find a way to keep that girl control Byakuya away from Rukia.
Intention: I just like you,