User blog comment:Shunsui Kyoraku/Pirate Zanpakuto/@comment-44061-20091115075549

She was in the first episode of the arc. She is Shunsui Kyōraku's zanpakuto spirit Katen Kokotsu. She has not been seen since because her Minazuki and Sogyo no Katawari are using their power to seal the capain-commander. As the Unohana, Ukitake and Shunsui are the oldest and most powerful captains after the captain-commander.