Arthur Pendragon

Arthur Pendragon, often called King Arthur, was a famous past king of Planet Earth and brother to Morgana. He had some form of relationship with the famous wizard Semideus Merlin, as he gained possession of the sword Excalibur. Angeline thinks very lowly of him, perhaps in part because of his nonmagical nature.

History
Arthur is said to have had possession of Merlin's sword.

Relationships
Morgana: Morgana is Arthur's sister

Merlin: Arthur and Merlin share some form of relationship, since Arthur has been in possession of one of Merlin's swords of power, Excalibur

Magic
Arthur is purely nonmagical

Items
Excalibur: This is the legendary sword of Earth and the sword of origins. It can return things to their origins and dispell enchantments. Arthur somehow obtained it from Merlin.

Trivia

 * Arthur is based on the king from Arthurian legend.