Very calm and cool-headed, she does not show much emotion. Her father was murdered by Genom executive Brian J. Mason, and his death was covered up as an accident, but an unknown individual managed to send Sylia a data unit, providing her with Genom's future plans and the technological means of creating the Knight Sabers' hardsuits. She wears a blue and silver Hard Suit equipped with retractable sword blades in the forearms, laser cannons in the palms and wings for full flight capability.
Professionally, Sylia is a wealthy businesswoman whose business ventures, aside from the mercenaries' fee, finance the team. Her primary business is the lingerie shop "Silky Doll" she personally runs, housed in her private building, Lady's 633, on whose top is also her penthouse apartment functioning as the Knight Sabers' base of operations. Her civilian vehicle is a red Mercedes-Benz 300SL Gullwing coupe.
Several questions about Sylia and her origins are raised in the series, but, due to the incompletion of the OVA series, never conclusively answered.
In the 2040 series, Sylia takes a less active role, only suiting up occasionally for particularly tough enemies, or for personal vendettas. It is revealed in the 2040 series that the Knight Sabers are the second team she has led. The first team used more conventional hardsuits and were killed in combat. Unlike the original series, in the 2040 story Sylia finances the team completely, and pays the other women double combat pay for tougher enemies. Also, unlike her stoic original self, Sylia is more flirtatious and playful on the surface, but prone to violent mood-swings when not in public.