Fthos

Fthos is the third world visited by the Daban Urnud, and the most recent one at the time our story takes place. The Fthosians form the core of the Fulcrum, along with at least a contingent of people from Laterre. Jules Verne Durand, despite being of Laterran ancestry, was born on Fthos, and describes it as seeming to him like a more perfect version of Laterre, which seemed like a more perfect version of Tro, which seemed like a more perfect version of Urnud. He also says all four seem like less perfect versions of Arbre; this may be related to the fact that each world in the chain was the previous one's Hylaean Theoric World.