Marcus

History
In season 1, Marcus is the Prince of Camelot, the son of King Arthur and bearer of the powerful sword Excalibur. As the Prince, Marcus was the leader of the Warriors of Chronos. Marcus was heroic, proud and brave and he always put himself before the others in any situations, making him a great leader. Since a very young age, he was very close with Leana, the then Princess of the Amazons, and growing up, he fell in love with her-- fortunately, the feeling was mutual.

In the first episode of season 2, "Coronation Day - Part 1", King Arthur retires and Prince Marcus has to prepare for the ceremony that'll make him King of Camelot. Because Camelot tradition wants that no King should be crowned with a Queen, the coronation doubles as a wedding, uniting Marcus and Leana. Since the coronation, they have been King and Queen of Camelot.

The pair have shown to be a very odd pair of King and Queen; since they were warriors before their coronation, they are very able to defend themselves and they get bored easily with royal duties. In "King Marcus' Day Off", King Marcus takes a break from royal duties by beating up bad guys, which he didn't get the chance to do anymore since the coronation. While he doesn't regret being King, he does miss being a Warrior of Chronos: King Marcus showed that he could be a good King when he had to make choices that went against what others wanted. In "The Fall of the Wizard" story arc, King Marcus doesn't punish Merlin's murderer, Kryll, for his crimes, instead he forgives him for he was only a child, and that Sinistra was the only one to blame for Merlin's death. Despite other Warriors asking Marcus to lock Kryll away, King Marcus lets him roam around Chronos as a traveler so he can find himself.

In the parallel dimension Luna visits in the story arc "Luna and the Warriors of Chronos", Marcus was killed by the alliance of Shang-Tsei and Sinistra, and Shang-Tsei became bearer of Excalibur.