The Hunters are an elite group loyal to the Invasion Force and antagonists in the Extinctioners universe - each Hunter has a partner in the form of a "Tracker", a humanimal who has either been enslaved via a mind-collar or willingly joined the Invasion Force, usually these humanimals will have superhuman powers and are referred to as hybrids in-universe (much as the term "mutant" or "metahuman" is used in other works).