So, I have a character that re-occurs within the 3 books I wish to write, and every other character changes. He's not actually alive, but is a figment within a network that can control most forms of life. The first book is the past, the second is after the war the middle, and the third the future. And as time goes by, he becomes cold and realizes he wants to live any way possible. I want to make him progress into an evil character in order for the 3rd book to exist, but I don't want to hint too obviously in the first book. How should I portray his character upon first meeting him?