Ruka Akazaka

Ruka Akazaka (朱坂 瑠花, Akazaka Ruka), otherwise known as the demonic weapon Soul Edge to those aware of the truth, is an assassin and a magician of human origin; those who knew better identifies her as a demon—a terrifyingly accurate epithet whenever she cuts loose.

Trivia

 * Ruka exists as a possible replacement character for Sanra.