Zelgius

The Black Knight is Daein's most powerful general. The Black Knight's identity is never spoken of, save for the fact that he was once a student of General Gawain and is now the most powerful of Daein's Four Riders. He wears a special suit of full-body black armor that has been blessed by the goddess, making it impenetrable to all weapons save those that have also been blessed, such as Ragnell. He also has access to numerous other arcane items as well, such as the Warp Powder he uses to travel, his sword Alondite, and the sword Ragnell which he gives to Greil seemingly as an act of mercy (but mostly for an interesting battle). After killing Greil, he becomes Ike's mortal enemy, and he spends much of the game performing acts to enable Ashnard's efforts, such as providing Ashnard with blessed armour much like his own. Ashnard, after a comment from General Petrine about the Black Knight's strength, said he would be interested in challenging the Knight some day.

Ike engages the Black Knight in a duel after capturing a Daein castle. When the Black Knight is defeated, he commends Ike on his growth in skill and strength, after which traps are set off in the fortress, burying him. The character is voiced by voice actor Junji Majima in Japanese; in English, the voice is provided by Mark Dias.