Christopher was shown to be a normal, highly intelligent teenager before the apocalypse occurred, though he did appear to be extremely angered at his father for leaving and seemed to hold this against him for the rest of his life. Travis stated at one point that Chris was kind and had a big heart as a kid, but his anger developed after the divorce. Like everyone else, Chris slowly adapted to the apocalypse in the beginning and retained his kind side, though after the death of his mother, he is shown to be even more angered and traumatized.