Arthur Pendragon: The main character named after his ancestor of the same name. The one destined to be king.
Played By: Danny Griffin
Robin Loxley: The adoptive older brother of Arthur and the person he's closest to.
Played By: Taron Egerton
Marie Loxley: Arthur's adoptive mother who found him alone when he was only 6. She raised him alongside her son, Robin.
Played By: Alyssa Sutherland
HAREM:
Marygaery Tyrell: The last that Arthur meets of his future wives. Arthur didn't think much of her at first but after helping him with a problem that arises he begins to see her in a new light.
Played By: Natalie Dormer
Daenerys Targaryen: The second of three that Arthur meets. She initially wanted Arthur to join her cause believing him to just be a skilled mercenary but after seeing the power he holds as well as hearing his family name and after a conversation with Merlin, she decides instead to help push Arthur to be on the iron throne. She is the one closest with Arthur.
Played By: Emilia Clarke
Sansa Stark: The first of the three that Arthur meets first. Due to her naive way of thinking and her engagement to the dickhead of a Prince, Arthur didn't get along with her at first but eventually after her going through tough times and Arthur being the one to save her they begin anew and grow closer. She is one of three people that Merlin says is destined to rule along Arthur's side. She is the most possessive and obsessed with Arthur.
Played By: Sophie Turner