Win or Die
Ser Aegor Rivers, frequently called Bittersteel, was one of the Great Bastards and a son of King Aegon IV Targaryen by his fifth mistress, Lady Barba Bracken. He opted to reject the Targaryen surname.
Aegor was angry all of his life, and quickly irritated and offended. He did not smile, and especially loathed his younger half-brother, Brynden Rivers, and Brynden’s mother, Melissa Blackwood, who had replaced Aegor’s mother Barba Bracken as King Aegon IV Targaryen’s mistress.