Promon was an Irken mercenary who hadmost recently worked for Nightmare Vax. He had worked with a female Irken mercenary named Tees since the beginning of his career. Promon and Tees were assigned to kill Invader Vax. In a scuffle between Vax and Promon, however, Promon was killed.
He was very cruel and murderous. He enjoyed killing people, especially other Irkens. To Tees, he was very kind and sometimes brotherly. The two were possibly in love.
Promon had red eyes, a white PAK with red spots on it, a black Invader uniform, regular antennae, a scar on his eye, and red boots.