The idea of the Grim Underworld contradicts some of those already put forth by other sources, suggesting that only some are taken there, while others appear to travel to another destination. The Demon butler Alathazdrar claims to have once served as a ferryman on the River Noumenon in the Grim Underworld, but left to pursue other interests in Gielinor and the Infernal Dimensions. This suggests that the Grim Underworld is not necessarily impossible to enter or leave at will, which is further demonstrated with the reincarnation of Robert the Strong into Bob the cat.