In John Green's first novel, Miles, the main character, is a bit of a loner at first. He's bookish and has this strange fascination with last words. Alaska, on the other hand, is full of life. She's not afraid to break the rules and is always up for an adventure. She's also very emotional and has a lot going on beneath the surface. Chip is the kind of friend who is always there for Miles. He's street - smart and helps Miles adjust to the boarding school life.