A protagonist and well-known as Sam or by his public nickname, Mazer, he is an accomplished artist and game-maker with a complex backstory. After losing his mother and injuring his foot in a car accident, he is raised by his Korean grandparents in LA. Sam hides his pain and insecurities with bravado, striving to avoid sympathy from others. Despite his guarded nature, he shares a deep friendship with Sadie. Over time, Sam grapples with insecurities and strives to express his feelings more openly.

The third protagonist, Marx plays the crucial role of a producer in the creative process. Often underappreciated, Marx ensures the practical aspects of game designing are managed. He is generous, patient, and serves as a bridge between Sadie and Sam. Despite facing challenges such as racial bias in his acting career, Marx maintains an optimistic disposition. His presence and actions significantly impact the dynamics between Sadie and Sam throughout the book.