Soul Reaper operations are based out of the Soul Society, which is an afterlife realm in "Bleach" which is maintained by a being known as the Soul King. Travel between the human world and the Soul Society is extremely limited and monitored, but some Soul Reapers are stationed in the human world to carry out their duties. If this Soul Reaper is an assistant captain or a captain then they will have a "Gentei Reiin", or a Spirit Restriction Seal, on some area of their body. This seal will limit their spiritual powers to one-fifth of their full power and it can only be released in a state of emergency. In addition to these laws, it is a crime for a Soul Reaper to remain in the human world for longer than directed. A Soul Reaper's duties include leading wandering spirits to the Soul Society by giving a to souls yet to become hollows and defeat those who have. High-level Soul Reapers and similarly powerful beings are able to levitate by standing on the spiritual energy in the air.