Arbiter of Eternity

The Arbiter of Eternity, sometimes simply "Eternity", was the leader of the Firmament, the species who were to the 10,000 Dawns as the Great Houses were to the Totality. He had a daughter, the Arbiter of Knives. In a holographic show created by Archimedes Von Ahnerabe using characters modelled on famous actors known to Rachel Edwards, the Arbiter of Eternity was "played" by Lin-Manuel Miranda.

Being immortal like the rest of his people, the Arbiter of Eternity eventually complained that he had exhausted every book that had ever been written in the 10,000 Dawns and lacked for entertainment. In response, the Arbiter of Knives told him of the Book of Books, a supernatural, infinitely-long tome which had found its way to another universe alongside a cache of books from the 10,000 Dawns, which described the great space-time war of the other universe as fiction. Though leery of attracting the attention of their counterparts in that universe and starting an interdimensional war, the Arbiter of Eternity authorised the mission so long as the Arbiter of Knives understood that he would deny all knowledge of it in case anything went wrong. Her attempt to get the book was ultimately stopped by Dawn agents Graelyn Scythes and Archimedes Von Ahnerabe, together with a denizen of the other universe, Rachel Edwards. (PROSE: Rachel Survived)