From A Wiki of Ice and Fire
|Allegiance|| House Hunt|
|Book(s)||A Feast for Crows (Appears)|
He has a plain face with brown hair, hazel eyes and a scar near his left ear.
While at Highgarden, Ser Hyle was among the knights that started the wager on who was going to take Brienne of Tarth's maidenhead. In his attempt to woo her, he brought her apples and carrots for her horses and a blue silk plume for her helm. He told her the camp gossip and said things to make her smile. When Lord Randyll Tarly heard about this wager, he had it stopped. Ser Hyle knows of at least one bastard that he has fathered – a girl. 
A Feast for Crows
He follows her through the Riverlands, stays with her at the Quiet Isle and visits the destruction of Saltpans. While at the Crossroads Inn, Ser Hyle asks for Brienne's hand in marriage, but she rejects him.
After the encounter with the remnants of the Brave Companions at the Crossroads Inn, Ser Hyle is taken prisoner by those sworn to Lady Stoneheart. He is judged guilty for allying himself with House Lannister and sentenced to death. He offers to fight Ser Jaime Lannister in Brienne's stead but is rejected. He is hanged alongside Podrick Payne and Brienne.