The Prince of Envy, commonly called Envy and whose true name is Leviaethan, is one of the novel’s two protagonists. Though not a narrative voice within the novel, he is one of two narrative focal perspectives for the narrative’s third-person narrator. He is Camilla’s main love interest. Though his lineage is unknown, Envy is a Prince of Hell who, along with his six brothers (Wrath, Pride, Lust, Gluttony, Greed, and Sloth), oversees the Seven Circles of Hell in the Underworld. 

As the master of House Envy, he is a demon who derives his power from all those who feed his titular sin. Decades before the novel begins, Envy once dallied with a mortal woman who’d begged him to borrow the Chalice of Memoria, an artifact with the power to purge his court members’ memories. The chalice was stolen, however, when the woman in question was seduced by Lennox, the Unseelie King. Though Envy tried to save her, he ultimately failed, and the chalice remained in Lennox’s possession. As his court members were no longer able to purge their memories, Envy’s court was plunged into gradual and fatal chaos from the memory fog. To reclaim the chalice, he is forced to participate in Lennox’s fatal game.