Zelgius (ゼルギウス, Zerugiusu), better known as the Black Knight (漆黒の騎士, Shikkoku no Kishi, Dark Knight in the Japanese version), is a boss character in both Fire Emblem: Path of Radiance and Fire Emblem: Radiant Dawn, though he is also playable in the latter. He was Daein's most powerful general during The Mad King's War, and a member of Daein's Four Riders. However, he is first seen as Zelgius when