User blog comment:Xilinoc/Ch. 635 - Hooded Enigma/@comment-5657895-20150715154652/@comment-5657895-20150717170131

Differencing being Bazz B actually has a history with Jugram and thus his existence serves to explain that. Hisagi is a Vice-Captain with no development since Fake Town Karakura. He has no connection with any of the remaining Stern Ritter, and given the number of powerful allies to Ichigo still in the game (Urahara, Shunsui, Byakuya, Renji, Yoruichi, possibly Ukitake), Hisagi serves no function. He's too weak to do anything (nor should he be doing anything so beyond his relative importance to the story. Might as well have written him out like Komamura.