Arthur Pendragon

Arthur Pendragon is a member of the Khaos Brigade's Vali Team. He is a descendant of King Arthur, as well as a descendant of the witch Morgan Le Fay, and is the older brother of Le Fay Pendragon. He is one of the two best swordsmen of the Khaos Brigade alongside Siegfried of the Hero Faction, and is known as The Strongest Holy Sword User.

Appearance
A bespectacled young man with blonde hair dressed in a business suit.

Personality
A cool, gentlemanly swordsman. Arthur appears to be obsessed in finding an opponent suitable of his Holy King Sword, Caliburn.

History
Arthur joined the Khaos Brigade sometime before the series, and was originally part of the Hero Faction where he was Siegfried's rival before leaving the Hero Faction to join the Vali Team.

Birth of the Breast Dragon Emperor
He first appeared in Volume 5, rescuing Bikou and Kuroka under Vali's order while revealing his identity to Issei Hyoudou, Rias Gremory, Koneko Toujou, and Tannin.

In Volume 6, Arthur appears alongside Vali and Bikou, saving Asia as they were scouting the Dimensional Gap, witnessing Issei's Juggernaut Drive and the appearance of the Great Red. He then leaves the Underworld along with Vali and Bikou after reintroducing himself this time to Xenovia and Yuuto Kiba.

The Heroic Oppai Dragon
He reappears in Volume 7, helping his fellow Vali Team members in the fight against Loki and Fenrir, killing one of Fenrir's sons before using his Excalibur Ruler to subjugate Fenrir after Vali weakens the wolf with his Juggernaut Drive.

In the beginning of Volume 12, he and the other members of the Vali Team were hiding in the Gremory Palace while waiting for Vali to recover from Samael's poison. He later attacks Hades' Palace along with the other members of the Vali Team, successfully killing many Grim Reapers under Hades. He is later seen reporting to Vali who was with Sairaorg Bael and the Gremory Team, challenging Yuuto after deeming him to be a worthy opponent for his Holy King Sword, telling Yuuto that he will fight him when Vali fights Issei.

Powers & Abilities
He is a natural-born Holy Sword user and wielded one of the seven Excaliburs, "Excalibur Ruler", the strongest Excalibur fragment, along with the Caliburn, the Sword in the Stone and the most powerful Holy Sword in existence. In Volume 11, Le Fay gives the Excalibur Ruler to Irina after Arthur abandons the sword, as Fenrir no longer needed to be controlled by it.