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R

Raeas – A domesticated Plains-dwelling creature that the Daevyn use for riding and as a pack animal. The silvery-grey raeas floats over the ground in the thick air of Tranthaea and uses its flat, vertical tail-fin to guide its movement. It's long head and short neck make it a good grazer, but less-than-effective as a creature of war.
Raldarr – A Carvain in the Valang military and associate of Hobnar. (See also Carvain)
Raphael Varas – Late Baron of House Galvan and father to Dominik Varas.
Rata – A Human male from the nation of Earth in 3207. He becomes a Seed Keeper of Tranthaea.
Ravyn Frantz – A member of Dante's crew. She and Dante are the brains of the operation.
Razer – A type of Breaker that controls stone and dirt.
Remlar – A Severant First Order in the Valang military and daughter of Cobarr. (See also Severant and Cobarr)
Restorer – An Aru Elen bounty-hunter. Trained by their Aru Faylen masters, the Restorers were sent to hunt down their own kind who tried to escape slavery.
Re-strainer – A helmet made of sand and dirt that is exposed to lightning and turned into a muddy glass. They are created and sold by the Daevyn to the gru’Esh, protecting the sensitive eyes of the gru’Esh when above the ground.
Rhonda Mackey – A resentful foster parent in L.A. in 2012. Jingwei's caretaker.
RMS Carpathia – A ship that diverted from its course in 1912 to rescue passengers of the downed ship, the RMS Titanic. Workplace of Callum Swift.
Romi – ​See Blade-Finned Romi.
The Roots of Tranthaea – A seemingly-bottomless canyon that sits in the south of Tranthaea. A series of bridges run across the divide at various heights, going deep into the ground. These bridges are known as The Crossing. 
Roqu'tic – A gru'Esh village near the Undermound in the Warrens.
Roth Kalaan – A northern city built of stone, set down into the ground so that only the peaks of its spires are visible from a distance. It is the stronghold of the Lady Tosh. (See also Tosh)
Roum – An Aru Faylen Elder, known for his military cunning. He holds political views that cause a divide in the Aru Faylen leadership.
Runat Far – The new Valang Loyalist capital, located in the distant north-western desert.