The Twa Corbies
Hedge Knight of good reputation
Ser Flynn is well known for fighting a good battle, the name of Ser is awarded to him by his peers and would be made formal if it wasn’t for his long standing hatred of the class system.
He is a second son of a minor house, his wastrel brother inherited their father’s title and lands and despite the way in which the wealth of both have been eroded by his brother no-one wishes to cause war and take the title away. As such Flynn fights for the right regardless of their status in Westbros.