Okay. Aizen took out Hitsugaya and Hinamori. Captain Unohana and her lieutenant, Isane, came and discovered the conspiracy. Aizen and Gin left for the promontory where the executions take place, where Tousen had just brought Renji and Rukia. Isane, as ordered, sent a message detailing Aizen's treachery to all officers and the ryoka. Ryoka are non-Shinigami, and refers in this case to Ichigo and company. Unohana's kinda neutral: her main concern seems to be that everything end as quickly as possible, with minimal bloodshed. I finally figured out her hair: it's crossed in the back and braided in the front. I'm envious; her hair is so long. Anyway, Aizen wanted Rukia because Urahara had hidden something that crosses Hollows with Shinigami for more power, as I understand it, inside her soul. He got it, since he's the most powerful character so far. He, Tousen, and Gin have joined the Menos Grande, the super-Hollows. Byakuya saved Rukia at the last minute, and apparently she's his sister-in-law, not simply adopted. Everyone was there to see Aizen and co leave except for Hitsugaya and Hinamori. All of Ichigo's friends; Ichigo, who was on his front in a puddle of blood; Kuukaku and Jidanbou; Yoruichi and Sui Fong; all of the captains and lieutenants except Hinamori and Hitsugaya (Ukitake and Kyouryaku's fight thankfully ended when they had to come see what was up); and Ikkaku, who may or may not have been the only third officer present.