Originally Posted by
Zero
Actually, they need to eat. The reason why Renji and Rukia were stealing candies, when they were young, is because they would die without eating them. The soul needs air to breath as well, as it can be chocked to death. A human soul has blood, has bones, internal organs, everything that a normal body has. It even works in a similar matter. Not to mention that when Ichigo's Soul was damaged, his body would reflect that. The body itself is only a shell and a copy of the soul. It's purpose is to protect it, until it is ripe.
Mass killing huh ? Couldn't they just transport them to earth for the time being to balance the scale of souls ?