Duncan is a Haven hero in Heroes of Might and Magic

V add-ons, Hammers of Fate and Tribes of the East. He's aslo one of protagonist in this game.
Background[]
Duncan was the leader of the rebels who stood against Isabel's tyranny. He was captured, but later freed by Freyda to restore things in the Griffin Empire. He went to his friend Wulfstan to aid him in the fight. They came to Horncrest, the capital of the Stag Duchy, and re-claimed it. They joined with Ylaya and true Queen Isabel to defeat King Tolghar.
Later, he and Freyda met Zehir, who cleansed the land of demonic magic. With this, they managed to make an alliance with the Red Church and attack the demons. They came to Talonguard, where they fought against Biara's forces. Isabel abidacted and named Freyda the Queen, while Duncan became the King of the new Holy Unicorn Empire.