Sugar leads the self-proclaimed rival group, the Three Girls Gang, setting her sights on overthrowing Lum, Benten, and Oyuki. She masters the gang's schemes to demonstrate their superiority.

Her appearance features a Chinese-style tunic (qipao) and a bun hairstyle. She has blue hair styled to shoulder length and brown eyes, presenting as a teenager. While her hair was black in the original series, the 2022 remake depicts it as pink. She possesses the ability to blend into her surroundings, achieving near-invisibility, though this camouflage remains imperfect and detectable.