Rosalie wears gloves in the Twilight movie series for a practical reason: she accidentally cut her hands while filming a scene. The injury occurred while filming the scene where Rosalie breaks a glass bowl, leading to the use of gloves to conceal the cuts.
This practical reason explains why Rosalie wears gloves in the first movie, but her glove-wearing habit also has implications for her character. Some fans interpret the gloves as a symbol of Rosalie's aloofness and coldness, highlighting her discomfort with physical contact. Others view it as a manifestation of her perfectionism, emphasizing her need for control and her desire to maintain her flawless image.
The gloves, therefore, serve a dual purpose in the film: they address a practical filming issue and simultaneously contribute to Rosalie's character development.