Big Mildew

Big Mildew is a massive, hulking figure with green skin, his hands, feet, face, chest, and back marked by patches of brown.

The series reveals little of Big Mildew's inner life. He comes across as a dependable if minor hero, aligned with the Global Defense Agency and most often seen fighting shoulder to shoulder with his partner Business Baby.

How Big Mildew gained his abilities is never explained; at some point he became a superhero and took up work with the Global Defense Agency. He attends the Guardians of the Globe funeral beside his apparent ally Business Baby and is later knocked unconscious during the battle with Omnipotus. When Doc Seismic captures a group of heroes, Big Mildew is among them, freed by the ReAnimen to turn on one of Seismic's allies.

During the Invincible War he answers Brit's call to defend Earth from the evil Invincible variants, deployed to Paris alongside Business Baby against Stripevincible; a blow sends him crashing down with Business Baby on his back, who is crushed beneath him yet somehow survives, a testament to Big Mildew's raw strength and the durability that lets him weather such attacks. In the war's aftermath, guided by Business Baby, he hurls a car at Slaying Mantis to stop the villain from chasing a civilian, then joins the fight when the car is cut apart.