Gauche's younger, paraplegic sister. Born on the Day of Flicker, like Lag. Her brother left her to go to Akatsuki, and eventually disappeared. When she would meet Lag, years later, she had claimed to have given up on Gauche being alive. She later learns he is alive, and Lag promises to find him. After the encounter with Noir outside Honey Waters, when Lag returns home, Sylvette throws him a party because he had found Gauche, as promised. She rents Gauche's room to Lag, Niche, and Steak, and she makes Dolls to cover the rent and expenses. Lag thinks her soup is as terrible as "The Three Brothers' Soup" Gauche had brought with him on his journey; Zazie sympathizes with him on this.