King Mark (fully name is King Mark Leonar II) is the king of Darion and father of Amelie. His court is located in the Castle Kronberg, in center of Greenwort, on the continent Darion. You are his treasure hunter. He is the questgiver for the main story quests in Darion.
King Mark is the "usual" good king; a capable ruler and administrator, severe but kind, and with a infinite love to his daughter Amelie.