Sonia is a student of Hope’s Peak Academy, the Ultimate Princess from Novoselic, a tall and graceful young woman with long, pale blonde hair that flows in soft waves down her back, usually adorned with a dainty black ribbon or a jeweled hair ornament. She has clear green eyes that sparkle with curiosity and a gentle, welcoming smile. Her skin is fair, and she often wears elegant yet modest dresses in light colors — a mix of European royal tradition and modern fashion.

Despite her refined upbringing, she often carries small, quirky accessories, like a skull-shaped keychain or a book on urban legends.