Lysa Arryn is a character from the fantasy series "A Song of Ice and Fire" by George R.R. Martin, which was adapted into the television show "Game of Thrones." She is the widow of Jon Arryn, the former Hand of the King, and is known for her fragile mental state and overprotectiveness of her son, Robert Arryn. Lysa resides in the Eyrie, a castle located high in the mountains of the Vale. Lysa is the sister of Catelyn Stark and is often portrayed as paranoid and unstable. Her character plays a significant role in the political intrigue of the series, particularly through her actions that impact the relationships between the major houses of Westeros. Her decisions are influenced by her past traumas and her desire to protect her son at all costs.