Negan was introduced in The Walking Dead's sixth season and, since then, the cruel and egotistical villain proved to be a complete nightmare for Rick Grimes and his group. Although many things could be said about the former leader of the survivors due to his horrendous behavior, Negan was seen as somewhat of an antihero towards the final seasons of AMC's The Walking Dead, having changed his tune after being imprisoned in Alexandria for seven and a half years.