Shikkoku no Kishi

漆黒の騎士, Black Knight,Jet-Black Knight,Dark Knight,Blackknight,Sinister General

The Black Knight 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.

(Source: Fire Emblem Wikia)