Ser Eyan Whent, popularly nicknamed the Knight of Yellow, is a minor character in the first, second, third, sixth, seventh and eighth seasons of Game of Thrones. He is a knight from the Riverlands and one of the last members of House Whent following Robert's Rebellion.
Eyan is descended from the main branch of House Whent. He was good friends with Brynden Tully. He briefly visited Brynden at the Eyrie in the Vale. Eyan had two daughters following his marriage to
Eyan was present at the Eyrie during Tyrion Lannister's trial, witnessing the death of Ser Vardis Egen. While not close friends with Ser Vardis, Eyan offered to foster his son at Harrenhall.
Eyan became furious over King Joffrey's decision to give Harrenhall to Petyr Baelish, and headed north to join Robb Stark.
Eyan overheard a drunk Bolton bannerman during the night of Edmure Tully's wedding at the Twins, learning quickly of the Bolton-Frey-Lannister alliance. He quickly entered the twins just as
Eyan gathers a group of knights in the Riverlands, and reunites with Ser Brynden Tully to retake Riverrun from House Frey.