Sylia's father was murdered by Brian J. Mason several years before the series began. Sylia was the one who recruited the Knight Sabers through various means such as creating a computer system that only a genius could hack into, appearing as a talent scout for an aerobics audition and hanging around the slums of Tokyo hoping to find a capable street fighter. It has been hinted that there is more to Sylia Stingray than she lets on. The boomer villain Largo was able to communicate telepathically with her, implying that Sylia's not entirely human.