Mordred

Mordred (モードレット) was the 9th seat of the Order of Diabolos and a knight in the round table. However, he was killed by Shadow and the Shadow Garden.

Personality
Like many high-ranking members of the cult, Mordred is a delusional-yet-foolish psychopath who is completely convinced of his own invincibility. It seems that he was gone without a worthy opponent for so long that he views fights as being beneath him and instead prefers to just casually chat with his opponents, during which he was a tendency to even give away vital information. When he was finally confronted by the fact that he was outmatched, Mordred slipped into denial and attempted to absorb Ragnarok in a desperate attempt to boost his power, which the Shadow noted did not bridge the gap between them at all.

Overall, as described by the Shadow, Mordred is nothing more than "a mook who's all bark and no bite".

Return to Earth
Following his death, Mordred's severed head was transported to Earth where it was found by Akira Nishino. The latter later attempted to use it in his experiments by injecting 'Natsume' with his blood but was assassinated by Yuka before he could do so. Yuka would instead inject Akane, causing her to go berserk until she was stopped by the Shadow. It is unknown what became of Mordred's head afterward.

Powers & Abilities
He was a skilled swordsman with the use of an legendary magic sword. however, he was stood no chance against the forces of the Shadow Garden forcing him to summon Ragnarok. Despite his desperate actions, he was still not able to best Shadow even when get power by eating Ragnarok's flesh which is still a pathetic measly power.

In the web novel, he was able to heavily injure Epsilon in one-to-one combat; although he caught her off-guard.

Trivia

 * Mordred is based on the knight Mordred from Arthurian legend.