Vallkos was a pirate of the Human variety (of male gender) and the sibling of Mallikhan. As part of a sizable group of pirates, Vallkos and Mallikhan journeyed to the planet called Volik which was located in the Unknown Regions at some juncture during galactic times. Nevertheless, after an argument concerning a woman, the pirate group was divided into a pair of competing groups: namely, the Crimson Stars and the Ebon Strikers. Vallkos rose to be the head of the Crimson Stars, whereas Mallikhan took command of the Ebon Strikers, resulting in a bitter rivalry between the two.