Harry Potter fan fiction

Diana Potter learned about her twin on the day before she meets him! Her twin is none other than Harry Potter, and she is a witch. For the start of her adventure, she goes through her first year with her twin brother, Harry Potter, who lived with the Dursley's. In her second year, she and Harry fight a huge snake! In her third year, she finds out her uncle killed people... but it wasn't really him, and learns a new spell, called a patronus. In her fourth year, she cheers for her brother as he goes through the tasks of the tri-wizard tournament. In her fifth year she goes to secret meetings that are only secret from her defence against the dark arts teacher, Delores Umbridge. In her sixth year, she fights in the war against the death eaters... and Lord Voldemort himself! At the war, she has to watch Dumbledore die... she gets to skip her seventh year, but Harry gets held back after he's done his seventh year. She doesn't get married and moves on to her own life... but not forgetting about her twin and her friends.