|“||So many vows. They make you swear and swear. Defend the King, obey the King, obey your father, protect the innocent, defend the weak. But what if your father despises the King? What if the King massacres the innocent? It's too much. No matter what you do, you're forsaking one vow or another.||„|
|~ Jaime Lannister mocking the vows taken by knights in the Seven Kingdoms.|
As their name implies, they are evil or misguided knights, high-ranking Military people from medieval times or a fantasy equivalent.
They can also be found in the modern ages, but it is a title rather than a military position, and a modern Knight shares their medieval counterparts' more traditional title of "Sir".