Joel Miller is an ISTJ, which stands for Introverted, Sensing, Thinking, Judging. Joel's appearance indicates that he was in his late 40s. He had a heavy, muscular build, with dark, graying hair and a beard. Joel is often described as an antihero. He is a hardened survivor whose obsession with survival is fueled by his desensitization due to his daughter's death. Joel's years of survival have led him to become resourceful, practical, and emotionally impenetrable.