Robert Arryn – Game Of Thrones Guide Robert Arryn is the only son of Jon Arryn and his wife, Lysa Tully. He is a sickly, whiny child of six, now Lord of the Eyrie and Defender of the Vale. He was House of the Dragon: everything you need to know (no spoilers) Who are all these blonde people?An introduction to the characters and world of House of the Dragon, the new Game of Thrones prequel show, based on the book…