While he was with Aogiri Tree he had trained to get more power for a reason unknown to the rest of the Aogiri Tree. He had been running with the Aogiri Tree for so long that he couldn't think himself outside the Aogiri Tree at all. There would be times that he would think of his sister and wanted to make sure that she was doing okay. Then the time came when he had to come back to the twenty ward. This was because of something that Aogiri had decided on. …show more content…
This was because he was co-operates with their boss to kidnap Ken Kaneki. While his sister was talking to him, he had punched her right in the face calling her a weakling like their parents had been. That was when Yamori had taken Ken Kaneki to their base. When CCG had attacked, he had fought against them while their boss was taking care of their hostage. Ayato had focused mostly all his power to attack CCG. Then he saw his sister coming there as well to rescue Ken Kaneki. He had fought against her and even eaten her Ukaku, so that way she couldn't fight CCG and he was able to save her from