User blog comment:DazzlingEmerald/Not Another One! Fanon Canon: Plot "Z" (Soul Society Civil War)/@comment-25579547-20150412112100

Nice. Kaisei Ryūren may as well join Raian. His target of being a Shinigami is to protect the innocent souls from suffering like he did, and as far as he knew, the current Gotei 13 lacks any immediate actions that he demanded. In order to appropriately do so without the Soul Society forbidding him and stand in his way, he may as well defect to do a better job.