Cat. Nicest 16 year old girl you could meet. Rainbow hair. Blue eyes. Daughter of Iris. But she has quite a few secrets. She has a major crush on her best friend, Nico Di Angelo. And she cuts herself. Even though she acts like the happiest person in Camp Half Blood, she is secretly very depressed. Her half-siblings in the Iris cabin bully her all the time. Nico. Dark lonely son of Hades. Complete opposite of Cat, except it's obvious that he's depressing. Best friend of Cat. Cat, Nico, and a guy named Jason Grace (Nico's friend) go on a quest for Hades. Will Cat have her happily ever after or suffer heartbreak and depression?

8th grader Malia Dowerson, or Mal as she likes to be called, is a nerdy fangirl. She loves reading and gets all A's. She writes fan fictions and has tons of internet friends. At her school she is the best student in every class but she gets bullied by the more popular kids. She gets partnered up with the most popular guy in school, Travis Smith. Mason Trip likes her. She meets a guardian, Kit, who introduces her to a whole new world. A prophecy started messing with her and other people. Trouble starts entering her life and she's not liking it.