User blog comment:Xilinoc/Ch. 590 - Marching Out the ZOMBIES/@comment-10587310-20140723121829

Not to rain on anyone's parade but i thought Hollows and Arrancars had spirit bodies and when they got killed by a Zanpakutō they are either sent to Soul society or Hell. Not only that but when a Quincy kills a Hollow that said Hollow is wiped from existence. So how can they be brought back all Frankensteined. The only thing I can think of is that buy gaining Shinigami like powers they retain there spirit body even after death. But that brings up another question why do Shinigami retain their spirit body when they die instead of just vanishing when they are reincarnated.