Gigan

"Monster of Steel" Gigan is a notorious criminal. He was imprisoned in the Underworld until being freed by Miranjo.

Appearance
Gigan is a massive monster with green skin, pale yellow eyes, and pointed teeth. He stands at least twice as tall as an average human, though he is still significantly smaller than a true giant. He wears a brown animal pelt held in place by light brown suspenders, a red helmet with devil horns, and wields an enormous two-handed hammer.

Plot
Gigan is one of the Underworld prisoners freed by Miranjo to conquer the Bosse Kingdom.