Rhaegar Targaryen was a key figure in the history of Westeros, known for his noble demeanor and tragic fate. He was the eldest son of King Aerys II Targaryen, the last Targaryen king to sit on the Iron Throne. Rhaegar was a skilled warrior and a talented musician, often remembered for his melancholic songs. His actions played a significant role in the events leading to the Robert's Rebellion, a civil war that ultimately led to the fall of the Targaryen dynasty. Rhaegar's relationship with Lyanna Stark and the implications of their union were pivotal in shaping the future of the realm.