From A Wiki of Ice and Fire
|Book||The Mystery Knight (appears)|
Ser Kirby Pimm was a knight, during the reign of King Aerys I Targaryen.
He was large and blond.
Ser Kirby was present when Ser Morgan Dunstable knighted Ser Glendon Flowers at the Pussywillows.
In 212 AC, Kirby attended the Whitewalls Tourney. He intervened when Ser Glendon Flowers was denied entry into the tourney and explained how Ser Glendon came about his knighthood to the stewards.