Sylvia was a chimera and one of the eight generals of the Demon King, serving as the director of the Monster Enhancement Division. They serve as the primary antagonist of the Konosuba Movie.

At first glance, Sylvia appeared as a towering, voluptuous and beautiful woman. They were so attractive that Kazuma seriously considered defecting to the Demon King's Army to be with them. As a chimera, Sylvia possessed traits typically unique to both males and females, having big breasts and the figure of a woman, but also male genitalia.