The past, present, and possible futures of Ser Brynden Tully of Riverrun, Knight of the Gate, called Blackfish.

“During one of their louder quarrels, when Catelyn was eight, Lord Hoster had called Brynden “the black goat of the Tully flock.” Laughing, Brynden had pointed out that the sigil of their house was a leaping trout, so he ought to be a black fish rather than a black goat, and from that day forward he had taken it as his personal emblem.” – AGOT, Catelyn VI

‘Even on his deathbed, Catelyn thought sadly. “He has not wed. You know that, Father. Nor will he ever.”’ – AGOT, Catelyn XI