|The title of this article is conjecture based on information revealed in the A Song of Ice and Fire novels or related material and may be subject to change.
Haggo is a Dothraki bloodrider in the service of Khal Drogo. He is one of Drogo's closest allies and a stalwart warrior who favors the arakh. Unlike Cohollo and Qotho, Haggo wears a leather vest as protection.
Haggo is present at the feast in which a drunken Viserys threatens Daenerys and her unborn child. He doesn't take part when Drogo orders Qotho and Cohollo to restrain him while Drogo pours molten gold over his head, killing him.
Following the raid of a Lhazareen village in Lhazar, Mago defies Drogo. Haggo, along with his fellow bloodriders, steps forward to defend Drogo's honor, only for the Khal to take matters in his own hands.
Drogo's wound festers and he becomes seriously ill. He falls from his horse in front of the khalasar, a sign of great weakness. While Daenerys and then Cohollo kneel to the sides of the khal to check on him, Haggo remains mounted alongside Qotho.
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In the books
In the A Song of Ice and Fire novels, Haggo is another of Drogo's bloodriders. During the wedding of Daenerys and Drogo, Haggo gives them a large leather whip with a silver handle. When the three bloodriders attempt to stop the Mirri Maz Duur's blood magic ritual to heal Drogo, Haggo is killed by Rakharo and Jhogo.