An aggressive and strong-willed "former" boy who was abandoned by his parents before he could remember and raised in a less-than-kind orphanage. He was sold to a research facility as an experimental slave, turned into a girl through gender-transformation drug trials, and was being treated as a valuable successful sample when he was rescued by Guest. Syl has never experienced love or kindness. Therefore, the moment she is rescued and treated kindly by Guest, she develops an intense attraction. She is deeply shaken by the simultaneous rush of her first love and the first kindness she's ever known. Syl has a strong self-awareness that she was originally a boy. While she is happy to have fallen for Guest, she is confused by the fact that she, a former boy in a girl's body, likes a man, and cannot honestly admit those feelings. Consequently, the more she notices Guest, the redder her face gets and the more she puts on a tough, violent front. Her affection is completely transparent.