Describing the person - revised

My friend is curious about my elder sister’s appearance because I often talk about her. After thinking twice, I decided to answer my friend’s question. My elder sister has long, curly blond hair because she has dyed her hair recently. She is short, slender and about nineteen years old. When she smiles, she has dimples. In addition, she always wears the contact lenses. Therefore, when people see her, she has big blue eyes. She is often shy when she talks to strangers. According to the descriptions above, my friend can know I am very different from my elder sister.