Rose-Marie (a.k.a Rose) was a vampire, servant of Klaus, and the best friend of Trevor. She sired Katherine Pierce, which caused Rose and Trevor to run from Klaus for 500 years due to Trevor helping Katherine escape from him and presumably ending the Petrova bloodline. They kidnapped Elena Gilbert, hoping to turn her over to Klaus for their freedom but Elijah killed Trevor, promising Rose her freedom. She fled after Elijah was staked and supposedly killed. She later joined forces with the Salvatore brothers to defeat Klaus and had a brief sexual relationship with Damon Salvatore. She was bitten by Jules, a werewolf, and was killed (staked) by Damon, who wanted to end her severe suffering. Her ghost visited Jeremy in Season 3, revealing she was turned by Mary Porter. She seemed to support Damon and Elena's feelings and wanted them together.Rose was born in 1450 in St. Austell, England but it is unknown exactly when she was turned into a vampire. She was later turned into a vampire by Mary Porter. In 1491, her companion Trevor sent Katerina Petrova to the cottage where they were staying. Rose was furious when she heard Katerina had fled from Klaus with the moonstone. She locked Katerina in a room and when she came, returned her to Klaus. She gave her some blood to heal because she was bleeding from a wound she had gave herself, and if Katerina died, then Rose and Trevor would die with her. However, Katerina hung herself and with Rose's blood in her system, she woke up as a vampire in transition. When Rose tried to kill Katerina, she failed, and Katerina fled. Rose and Trevor knew that they would have to be on the run from Klaus and the rest of The Originals until they died.