House Penrose of Parchments is one of the principal houses sworn to Storm's End, its crossed quills on russet marking a line that has long kept close to the crown. Lord Ronnel Penrose married Princess Elaena Targaryen and sat as Daeron II's master of coin, though it was Elaena who was known to do the office's true work, while Aelinor Penrose wed Prince Aerys Targaryen, who would become King Aerys I.
The house stayed loyal to the Iron Throne through the First Blackfyre Rebellion, a loyalty paid for in blood when Ser Quentyn Ball cut down all but the youngest of Lady Penrose's sons at the crossing of the Mander, sparing the last as a mercy to the grieving mother. Ser Jon Penrose carried the name into the lists at Ashford Meadow, unhorsing Ser Tybolt Lannister before losing their duel.
Lord Penrose, aged and failing by the time of the War of the Five Kings, raises his banners for Renly Baratheon at Bitterbridge but still welcomes Davos Seaworth kindly when he arrives as Stannis's envoy. His son, Ser Cortnay Penrose, holds Storm's End as castellan against Stannis's siege, refusing to yield the castle or his ward Edric Storm even as the garrison starves, until he is struck down from the walls by a shadow born of Melisandre's magic, his death made to look a fall.