Emmon Cuy

Emmon Cuy is background character in the second season. He is played by an unidentified extra and only appears in the "The Ghost of Harrenhal." Ser Emmon is killed by Brienne of Tarth after he blames and attacks her in the wake of Renly's assassination.

Season 2
King Renly Baratheon's camp is a hive of activity as his troops prepare for the coming battle with the forces of King Stannis Baratheon in darkness. The camp is beset by strong winds. Catelyn Stark meets with King Renly in his command tent. Ser Emmon and his sworn brother Ser Robar Royce are outside while Brienne of Tarth stands watch inside the tent. Hearing Brienne scream the guards rush into the tent with swords in hand. They see Brienne kneeling over Renly’s corpse and assume that she is responsible. The two knights threaten her life. Catelyn tries to intervene but they push her aside. Brienne fights both of them off, killing them.

In the books
In the Song of Ice and Fire novels, Ser Emmon Cuy is a member of the Rainbow Guard as "Emmon the Yellow" and hails from House Cuy of Sunflower Hall, a noble house from the Reach. Like in the episode, he enters Renly's tent just after his King's assassination. Cuy blames Brienne for the death and attacks her. Catelyn Stark convinces Robar that Brienne is innocent and he fights off the men-at-arms that follow Cuy. Ser Emmon and Ser Robar are later killed by Lord Commander Ser Loras Tyrell in a fit of rage, because of their failure to protect King Renly and their allowing Brienne to escape. As he lay dying Ser Emmon swears it was Brienne that killed Renly and thus the rumors of this follow her. Later, Ser Loras regrets his actions as they were friends and he comes to believe that Stannis was the one who killed Renly and not Brienne of Tarth.