Stalker is an antagonist of the superhero comic known as Extinctioners, he is one of several humans known as the Hunters who were sent to Alden in the past to ready the planet for the arrival of humans and recolonization at the word of Noah Adam Mahn, however due to an accident they lost contact with the rest of humanity and as a result began to utilize tactics that could be considered war-crimes by today's standards (though it still unknown whether or not Mahn's tactics are criminal or accepted by the other humans, who have yet to arrive on Alden).