Black Knight

Dark Knight or Black Knight (黒騎士) was a member of the Thirteen Heroes and the national hero of the City-State Alliance.

Appearance
His appearance was that of a knight covered in black armor and he also consider to be of demonic descent so some speculate he was a half-demon.

Background
The Dark Knight possessed the blood of demons, a mixed blood.

Two hundred years ago, when the world was plagued with dangerous monsters known as the Evil Deities. He along with other powerful individuals formed the Thirteen Heroes and fought against them.

Sometime during their journey, one of the players attacked the other and was killed by the latter while the former died shortly after refusing to be resurrected out of guilt. His exploits were legendary and tales of his death were told generations after he was gone. The Karnassus City-State Alliance considers him its national hero.

The Dark Warrior Arc
The Swords of Darkness explained to Momon and Nabe their party's namesake. They dreamed of obtaining the three remaining swords of the legendary hero.

Abilities and Powers
The Dark Knight was considered to be a powerful individual with tales of his exploits being told even generations after he was long gone. He possessed four powerful legendary swords known as the Swords of Darkness.

Main Equipment

 * Cursed Sword Kilineiram (魔剣キリネイラム)
 * Corrupted Sword Crocdabal (腐剣コロクダバール)
 * Death Sword Sfeiz (死剣スフィーズ)
 * Evil Sword Hyumilis (邪剣ヒューミリス)

Trivia

 * An adventurer group better known as the Swords of Darkness was named after the four legendary swords that the Dark Knight owned.
 * One of his Swords, Kilineiram is currently in the possession of Lakyus Alvein Dale Aindra of Blue Rose.
 * Ainz speculated that he had a Cursed Knight job class and his level to be at least level 60, but given his skills, he was more likely at level 70.
 * Aside from the possibility of him being a Cursed Knight, it is implied that he could be a fallen paladin or Dark Knight by name who uses blessing spells.
 * The Roble Holy Kingdom possesses a set of four blades that act as antitheses of his Swords of Darkness.