The Prince of Bones is a venerable war troll, and one of the oldest supporters of the Daughters of Sora Kell. The Prince of Bones is treated by Sora Maenya like a son, he was the first of the war trolls to be bred without a weakness to fire, and it's entirely possible that he is actually her son. He was the first commander of Maenya's Fist, and wears the bones of his unfortunate siblings who fell to fire.
The Prince of Bones was there when the Daughters of Sora Kell began their conquest of the region that would become Droaam, and was personally responsible for eliminating many of the regions chibs that refused to bend the knee. After the formation of the new fledgling nation, he was granted the region around Suthar Draal, an ancient dhakaani fort.
The bone armour that the Prince of Bones is adorned with is fused to his body. There are several stories that attempt to explain this, some claim that he learned the secrets of the Karrnathi Bone Knights and created his own bone armour, whilst another story claims that the bones of his siblings were fused to his body by Sora Maenya to reward his success.
The Prince of Bones worships the Cazhaak Creed, and has surrounded himself with seers and haruspices, who constantly attempt to divine the will of the gods and advise him.