When the story started, Charley was innocent. He loved animals, cared for people, didn't realize when he was the target of jokes, and just wanted to make others happy. As he became more intelligent, he focused more on making himself happy. He judged others, did things he wanted, and didn't really care about how his actions affected those around him. He did have some tender moments, like when he visited his sister and father but, for the most part, he cared more about himself and his needs where initially, his needs were irrelevant.