The Sha-Brytol are a group of dwarves, secluded past the Deep Roads.
Background
Not much is known about the history of the Sha-Brytol apart from the fact they protect the Titans. According to Valta, they are lost and misguided from their original purpose. They were all Dwarves who drank Titan blood and lyrium, and wear lyrium-infused armor. They guard the titans from those they consider not "pure" enough.