Rickon Karstark is a character from the series A Song of Ice and Fire by George R.R. Martin and its television adaptation, Game of Thrones. He is the youngest son of Rickard Karstark and a member of House Karstark, a noble family sworn to House Stark of Winterfell. After the death of his father, Rickon becomes a ward of Robb Stark, but he eventually goes missing during the turmoil of the War of the Five Kings. His fate remains uncertain for much of the series, leading to significant developments in the storyline as other characters search for him.