Yoo Sangah is depicted with long, straight brown hair with double-parted bangs. Her usual outfit consists of a black bodysuit with an above-cleavage cutout, several belts on her torso, legs, and arms, and a black jacket with a popped collar. Before the events of the novel, she wore a typical white t-shirt with a brown cardigan.

Due to the nature of her abilities, she often has a yellow lasso or some sort of puppet strings.

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