Harwel is a soldier at Castle Pendragon in Britain. He secretly lusts after Morgan.
During the events of Camelot: Season 1 Episode 7 The Long Night played by Dara Devaney
Morgan is practicing her transformation into Igraine while in the tub and as she is bathing, Harwel is standing outside the door peeping at her and masturbating. Morgan catches him and he tells her that he loves her and he'll do anything for her. She brings him to the dining area and has him tell Sybil his name and that he will do anything for her. Morgan then tells Vivian to get him prepared. King Arthur and other members of Camelot arrive at the castle and after dinner, the castle suddenly is attacked by flaming arrows. Kay sends a group of Morgan's soldiers as scouts to look for Ardwulf's forces. Harwel, who was part of the scouting group, returns wounded and says that Aldwulf is preparing to attack. In the morning, Morgan's Captain returns and says that they defeated Aldwulf's men. Sybil tells Harwel to recruit some men to attack the outpost at Bardon Pass.
During the events of Camelot: Season 1 Episode 9 The Battle of Bardon Pass played by Dara Devaney
A group of riders led by Harwel ride up to Bardon Pass and Harwel takes Albion's fallen arrow and slaps him in the face with it. The Border Guard sees and whistles to another border guard and they approach the riders. Harwel stabs and kills the Border Guard and the other border guard is killed. Albion runs away and then gets on a horse and Wallace asks Harwel if he wants him to send someone to stop Albion, but Harwel tells him that Albion is reacting how they want him to. Arthur and his men eventually arrive at Bardon Pass, and Wallace tells Harwel that Arthur has come. Wallace gives Arthur the chance to surrender, but Arthur refuses. Harwel and the mercenaries attack and Wallace tells Harwel that they have to retreat, and Harwel calls for a retreat.
During the events of Camelot: Season 1 Episode 10 Reckoning played by Dara Devaney
Harwel gives a speech to his men and asks which one of them will bring him Arthur's sword. Harwel sends Wallace next to kill Arthur. Fourth Marauder hands Harwel, Arthur's sword and Harwel hands it back to him and tells him to take it to Morgan. Harwel tells Marauder 1 that Wallace should be back and Marauder 1 offers to kill Arthur. Harwel's reinforcements arrive and they attack. Arthur manages to kill a few of them and Leontes joins him in the fight. Arthur and Leontes are surrounded, but are then joined by the rest of Arthur's men. Harwel's men retreat and as Harwel is about to shoot Arthur with an arrow, Leontes gets in front of the arrow. Gawain then kills Harwel.