Dave Watson and Mrs. Watson are Chris's parents. His father is an auto mechanic and his mother works at utility board, which Chris dislikes as he doesn't believe those are successful jobs. He also criticizes his father's weight and his mother's clothing and makeup.
Emma is Chris's sister. She is in fourth grade and is a Girl Scout. Chris thinks she is an annoying little sister. She has freckles and glasses.
Porkchop is Chris's dog. He has to take Porkchop on walks consistently.
Chris's clone is created from the Faz-Goo absorbing Chris's body. While the original Chris dies, the clone Chris takes his place, as if nothing ever happened. Chris tells his double to take care of his family and not to hurt anyone. Dr. Little lets the goo-counterpart to Chris free to enjoy the world for the first time.
Dr. Little is the teacher of the sophomore science class, as well as the leader of the Science Club. He is revered in the town for the "life changing" experiments he hosts in his class and club. This year, his experiment involves Faz-Goo. He is short and energetic.
Josh & Kyle
Josh and Kyle are Chris's old friends who met in preschool. Chris doesn't want to associate with them anymore because he fears that it will tarnish his high-status image he wants for himself. Josh has dark wavy hair, and Kyle has a purple streak in his hair.
San, Malcolm, & Brooke
San (full name: Sanjeet Patel), Malcolm, and Brooke are sophomores taking Dr. Little's science class. Chris desperately wants to impress them to maintain his high status, especially as a freshman. They meet up at an expensive coffee shop to study.
San has brown eyes, Malcolm is tall and lanky with red hair, and Brooke is black, and has braces and springy dark curly hair. It can be assumed that all three of them die and are replaced with their newborn goo counterparts.
Mrs. Harris is the freshman earth science teacher for freshmen. San, Malcolm, and Brooke make fun of the people who take the class, and Chris joins in.
Jacob is one of the participants in Dr. Little's experiment. Chris overhears him tell Dr. Little "He told me everything." before being dismissed. He is tall and has dark hair. It can be assumed that Jacob dies and is replaced with his newborn goo duplicate.
Mrs. Thomas is Chris's neighbor, and he is often told by his family to help her with chores which he begrudgingly does. She's nice to Chris, baking her cookies and even offering tutoring lessons if he needs them, although Chris declines.