Here's a bio on rosalie

Full Name: Rosalie Lillian Hale

Nicknames: Rosy or Rose

Age: 92 (looks 18)

Date of Birth: 1915

Date Changed: 1933

Changed by: Carlisle Cullen

Hair Color: Golden

Eye Color: Vampire gold/black

Height: 5’9”

School: currently "in collage"

Date of change to vampire: 1933 – she was 18 (PC1) (TL)

Places Lived: Rochester, New York

Forks, Washington

Physical description: Statuesque, model-like, wavy hair to the middle of her back

Personality traits: Tenacity

Family members: Married to Emmett

Adopted into the Cullens

Hobbies: Mechanical – tinkers with cars

Car: BMW M3 convertible – red

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Personal history: To be explored in Eclipse – Rosalie was brought into the Cullen family as a companion for Edward in 1933. However, the two never responded to each other as anything other than a brother and sister. In 1935,Rosalie found Emmett being attacked by a bear and brought him to Carlisle to be saved. She has married Emmett publicly several times, as she is all about show and being fussed over. Rosalie’s true defining personal trait is her beauty. Like Emmett’s strength–they’re both more intensely physical than intellectual, which makes them a perfect match.

It is Rosalie who tells Edward that Bella is dead, and sets him off on a mission to kill himself. She later apologizes. She is also the only one of the Cullens who does not vote in favor of Bella becoming a vampire saying that it isn’t a choice she would have made for herself.