The leaders of the mightiest khalasar on the Dothraki sea, Khal Drogo is a man entering his middle years. A great warrior and horseman, he is very tall with a long braid of hair that has never been cut because he has never lost a battle, and many bells hang from it to mark each of his many victories. Leading his tribe of horse-warriors, he has taken many slaves and looted many treasures, so much so that the magisters of Pentos pay him a bribe and provide him his great manse so that he will turn his attention elsewhere rather than attack them.
Taking Daenerys as his bride after negotiating with Viserys and Illyrio Mopatis, Khal Drogo takes her and his khalasar east to Vaes Dothrak. Along the way, his fragile bride gains strength and begins to become someone whom he can communicate with, and the two find love. In Vaes Dothrak, Daenerys is declared to be carrying his son, whom is prophesized to be the Stallion Who Mounts the World. However, in the celebrations afterward, Prince Viserys threatens to shed blood in the sacred city and Drogo puts him to death by upending a cauldron of molten gold upon his head. Travelling east after this, Drogo attacks a village of the Lhazreen, and is wounded by one of his own men who protests when Daenerys stops the rapes of women. Drogo allows a priestess of the Lhazreen, Mirri Maz Duur, to tend him at Daenerys’s insistence, but ignores her instructions. His wound terribly infected, he falls from his horse, greatly unsettling the khalasar. Daenerys has Mirri attempt to rescue him with sorcery, but this destroys the fabric of the khalasar, which falls apart. In the aftermath, Drogo’s body is alive but a hollow shell, and Daenerys finally suffocates him. She joins him on his funeral pyre, only to survive the conflagration, her petrified eggs giving birth to three young dragons.