Jōsai Yūzūmuge

"You lot really are stupid aren't you? Within a matter of hours, my entire fortress was repelled, and you didn't care to even inform me? Of course not, how would you? Only that geezer knew, he hid it from everyone, and then died himself. Well, I don't care. I have to rebuild this entire fortress again, don't I? ...What are you staring at? Get out."

- Jōsai talking to the Gotei 13 after the Thousand-Year Blood War

Jōsai Yūzūmuge (融通無碍城塞 Yuuzuumuge Jousai "Lit"; Free, Unfettered and Flexible Fortress) is a that wasn't very well known in the history of the  and the. He was never labeled as anything, and though a large contributor to the current Gotei 13, he was kept in the shadows by for unexplained reasons. Having revealed himself after the events of the, he takes a more active role in the defense of the Gotei 13. Jōsai, among the has been entitled the "Eternal Guard" (不変警備 Fuhen Keibi), due to his finding and construction of all  based constructs, and being the  for these fortresses.