Rhaegar emerged victorious from the Tourney at Harrenhal, where he surprised everyone by crowning Lyanna Stark the Queen of Love and Beauty. After winning another tourney a year later, she and Rhaegar disappeared together, the Starks and Baratheons believing Rhaegar to have abducted Lyanna. This spurred Robert's Rebellion, and Rhaegar's death at Robert Baratheon's hands during the Battle of the Trident during a terrifying duel. After Rhaegar's death, King's Landing was sacked and his daugther Rhaenys was stabbed to death by Ser Amory Lorch and son Aegon was slammed against a wall. Ser Gregor Clegane later raped and killed Princess Elia, causing enormous resentment among the Dornish aristocracy.
I never planned a character from the series, but my gf is a fan of the R+L couple and I gave it a try, since she told me all the story in detail. I took some elements from The World of Ice and Fire, so I know it's not extremely accurate, but I will work on it more in the next year of so.
I am not a great fan of asoiaf, I read the e-books thanks to the search mode for some rare characters that I love to bits, but fantasy has never been my genre (quite strangely, I do love everything sci-fi written by Martin, so it's probably a genre issue) although all the costumes are amazing.