Sia has long curly black hair, which she always keeps neatly brushed and defined. Her eyes are dark brown and almond shaped, with long eyelashes. Her skin is slightly tan. She is 148 cm tall, or a little shorter than 4 ft 10. She has two piercings on each ear, on which she always wears earrings. She keeps her nails trimmed and wears lavender colored nail polish.

Sia is an introvert. She likes to spend some time alone. She’s naturally shy, but she brings herself to socialize and make friends as often as she feels comfortable. Her personality type is INFP. She is passionate and proud, and excited to learn new spells. She enjoys reading, exploring, and dancing. She has a habit of wearing a hair tie around her right wrist, and swinging her feet when she sits down.

Before Hogwarts, Sia lived in rural London with her pureblood father and muggle mother. She attended a muggle elementary school. She is familiar with both the wizarding and muggle world. She loves her parents dearly, and they support her in all her goals. As a family, the Roses enjoy traveling during the holidays. Sia misses her family when she’s in Hogwarts.

Sia went to a party with her parents in the English countryside when she was five years old. She was overwhelmed by the colorful lights, and accidentally made a few light bulbs break. The incident occurred among her mother’s muggle family, and was deemed an unlucky occurrence.