Sōsuke Aizen
Squad Three was originally led by Rōjūrō "Rose" Otoribashi until he was forced to forfeit his post after Sōsuke Aizen placed him through Hollowification. Gin Ichimaru, formerly Aizen's lieutenant in Squad Five, takes Rose's position after Aizen revealed his true colors. After, Izuru briefly takes over the captain duties for a while, the anime depicting Shūsuke Amagai to momentarily hold the captain status before his death, Rose is allowed to resume his duties after Aizen was defeated.