Every living being has a soul, it's what WeeFee and Uhasyo gave us in order to live and feel. WeeFee and Uhasyo also made a soul-less creature that is sent to Earth to retrieve our souls so they can be recycled. Usually, after death, the soul enters a dream while they remain in heaven, hell, or limbo. Limbo souls can never be reincarnated, but those in hell or heaven can, so long as they are lucky enough to be reused.