Siren is a woman of hypnotic beauty. The horns on her head mark her as a witch, a being gifted with infinite power over weaker spirits. She wears an audacious dark dress of exquisite fabric, decorated by the symbols of her master, the Watcher of Thorns. On the fingers of her left hand she wears the Hooks of Destiny, which she uses to draw energy from her victims – and seal heinous pacts with them.
Siren is a cold and inhuman woman, easily drawn into violent angers, yet she cherishes a deep and secret love for her master Orin Aki.