Martin's Fire & Blood book!Jeyne Arryn is introduced in House of the Dragon season 2, episode 5, with the Lady of the Eyrie playing an important albeit isolated role in the Dance of the Dragons. At the end of House of the Dragon season 1, Rhaenyra sent her eldest son Jacaerys as an envoy to treat with Lady Jeyne Arryn in the Vale and Lord Cregan Stark in Winterfell. Before Rhaena leaves with Aegon and Viserys for Pentos, she stays at the Eyrie with Lady Jeyne Arryn (Amanda Collin), who is a cousin of Queen Rhaenyra Targaryen through her late mother, Aemma Arryn.