Preston Greenfield

"Ser Preston will be stationed here beside the... primary entertainment."

- Ser Jaime Lannister

Preston Greenfield is a recurring character in the first, second, third, fourth, fifth and sixth seasons. He is played by an unidentified extra and debuts in "You Win or You Die". Ser Preston is a knight and a member of the Kingsguard, defending King Joffrey Baratheon as he defended King Robert Baratheon before him.

Season 1
When Arya Stark was brought before King Robert Baratheon to answer for her possible involvement in the injury of Prince Joffrey, Ser Preston stands guard besides the King.

He was among the guards that attacked Eddard Stark when the Hand of the King attempts to arrest Cersei Lannister, and take her children into his custody.

Season 4
After Jaime Lannister returns to King's Landing, he goes over with Ser Meryn Trant the placement of the Kingsguard members in defensive positions during Joffrey's wedding, assigning Ser Preston a place close to the wedding feast "primary entertainment".

Season 5
Five members of the Kingsguard escort King Tommen Baratheon to the steps before the Great Sept of Baelor so the king can meet with the High Sparrow. Members of the Faith Militant block them.

In the books
In the A Song of Ice and Fire novels, Greenfield is a member of Robert Baratheon's Kingsguard. He is noted as the shortest member of the Kingsguard. He accompanied Robert on his boar hunting trip where he was mortally wounded. He pledges allegiance to Joffrey following Robert's death.

Ser Preston is killed in the Riot of King's Landing and replaced by Ser Balon Swann, who has been mentioned in the series but not as part of the Kingsguard. In the series no Kingsguard is shown to be killed by the rioters. Ser Preston is later mentioned as being alive at the time of Joffrey's wedding, meaning he survived the riots in TV continuity.