Brotherman is a vessel that contains the soul of Marco, the younger brother of Polo. Marco was flattened by a truck, his soul then inhabited the body of Eggman from the game "Sonic the Hedgehog", where he lived his days as an Eggman Torso. He participates in kart racing activities with other EXEs in the fangame EXE Kart, however, those events are not canon. Brotherman is Marco. He goes by both names. Polo is his brother, who we cannot interact with. Brotherman can't die, he's already dead.