Gunmar the Black was the central antagonist of the Tales of Arcadia franchise, serving as the central antagonist of Trollhunters, a unseen antagonist of 3Below, the secondary antagonist of Wizards, and a posthumous antagonist of Trollhunters: Rise of the Titans. In Trollhunters, he served as the overarching antagonist of Part One, the main antagonist of Part Two, and the central antagonist of Part Three. He was the leader/warlord of the Gumm-Gumms (until he was reduced as the second-in-command by Morgana), the archenemy of Jim Lake Jr. and other Trollhunters before him, and the father of Bular.