Rosalie Lillian Hale was born in Rochester, New York in 1915; she had two younger brothers, a housewife for a mother, and her father worked at a bank. Rosalie's fathers' job helped keep the family wealthy during the Great Depression. She was born beautiful and constantly praised, making her vain and self-centered. However, unlike her parents, who always wanted more out of life despite their already elevated status, Rosalie was just happy in the knowledge that she was Rosalie Hale, and that she was beautiful.
One day, Rosalie's mother had her dress up to deliver her father's forgotten lunch to his job, in the hopes that the son of the bank's owner would take more interest in Rosalie. It worked. Royce King the Second sent roses to Rosalie and, after making a comment that her eyes were like violets, Rosalie began receiving them, too. Their relationship was solely based on physical attraction, as Royce was often too busy at the bank. They became engaged and shortly before the wedding, Rosalie visited her good friend Vera, who Rosalie envied for her baby boy. At one point, when Vera's husband kissed Vera, Rosalie finally noticed the lack of love in her relationship with Royce that was so obvious in Vera's. While walking home, shaken by her thoughts about her loveless relationship, Rosalie stumbled across her drunk fiancé and his equally-drunk pals; Royce bragged about his fiancée's beauty which eventually led to Rosalie being gang raped and beaten.
Rosalie was found by Carlisle Cullen, the scent of blood having attracted Carlisle to the dying Rosalie. He carried her to a room where he made the eighteen year old a vampire, worsening the pain she was already in. She awoke to voices of the Cullens arguing about Carlisle saving Rosalie just because they stumbled across her when she was dying. Upon seeing her reflection, Rosalie's unhappy mood improved with her now improved vampiric beauty. Rosalie soon avenged herself by killing all who were with Royce that night. Having saved Royce for last, Rosalie donned a bridal gown and found her fiancé locked in a windowless room with a thick, vault-like door guarded by two men. Killing the guards, Rosalie entered the room where she tortured Royce to death. Though she killed these seven men, she did not taste their blood. After her transformation, Rosalie became a permanent member of the Cullen family.
Two years after her transformation, in 1935, Rosalie stumbled across a young man named Emmett being mauled by a bear. Emmett's features reminded her of Vera's young son Henry, and as such, Rosalie chose to rescue the dying man. Rosalie resisted the urge to drink Emmett's blood and carried him over one hundred miles to Carlisle, who turned him into a vampire. Rosalie and Emmett were rarely separated after this; the two having found in the other their true soul mate. The pair would marry often and sometimes lived separate to the rest of their adopted family as a newlywed couple.
By the 1950's the Cullen family welcomed two new additions to their family, Alice and Jasper. Due to their similar features, Rosalie and Jasper would often play the part of biological siblings who had been adopted by Carlisle and Esme Cullen. During the long decades of her life, Rosalie developed a passion for collecting cars akin to her adopted brother Edward Cullen
