From A Wiki of Ice and Fire
Bloodrider of Khal Drogo
|Died||In 298 AC, at Dothraki sea|
|Book(s)||A Game of Thrones (appears)|
Cohollo is the oldest of the bloodriders, a squat bald man with a crooked nose and a mouth full of broken teeth.
Cohollo saved Drogo from sellswords when he was still young.
A Game of Thrones
As a wedding gift to the newly-wed Daenerys Targaryen and Khal Drogo, Cohollo gives them an arakh chased in gold. When Viserys Targaryen bares steel during a feast in Vaes Dothrak and threatens Daenerys, Drogo orders his bloodriders to seize him. Qotho pins Viserys while the others disarm him.
Cohollo treats Daenerys kindly until she attempts to heal Drogo with the help of Mirri Maz Duur. Fearing the maegi, Cohollo and the other bloodriders attempt to stop her. Cohollo nearly slashes the khaleesi's throat during the attempt, but he is killed by an arrow from Aggo.