Erson

Erson, "friend" of the nameless white monster and Sulfer (they know of each other and will occasionally worked together to survive), is another large, big-animal hunting creature, humans still included. Much like nameless, he naturally gives off a radiation causing hallucinations, though the only thing affected by the hallucinatives is Erson's form, which could swap to appear as a harmless house cat, most often used as a lure for people or other hungry animals.