Charles Rowland is a free-spirited, punk-rock leaning British teenager and skilled ghost detective. After dying at age 16 at the St. Hilarion Boarding School, he chose to stay on Earth with his best friend, Edwin Paine, to run the Dead Boy Detective Agency. Charles is highly emotional, empathetic, and action-oriented. He serves as the agency's brave, "street-smart" muscle, handling monsters with a baseball bat and preferring practical, hands-on approaches. Charles Rowland is a tall, thin, half-Indian British teenager frozen in time as a 16-year-old ghost. He has short, curly dark hair, brown eyes, and a distinct free-spirited, punk-rock vibe. As a ghost, his outfit never naturally changes; he wears a red polo shirt, a black patchwork wool trench coat with pins, and black slacks. He wears a black trench coat with plaid lining, a Union Jack, and a "Rude Boys" patch on his sleeve. His red polo shirt often shifts in hue to maroon or black depending on his emotional state.

Edwin is the enigmatic, studious, and fastidious brain of the ghost-hunting Dead Boy Detective Agency. Sacrificed to a demon in 1916 Edwin Payne, he escaped Hell and Death to solve supernatural mysteries alongside his best friend, Charles Rowland Charles Rowland & Edwin Paine (The Dead Boy Detectives). Edwin Payne is typically depicted as a tall, thin, young white man of British boarding school age, with dark brown hair and blue-green eyes. He is known for his signature, historically accurate Edwardian and pre-1920s fashion style.

Crystal Palace is a powerful psychic medium who communicates with the dead. She joins forces with the ghostly detectives—Edwin Payne and Charles Rowland—after they save her from demonic possession, which tragically results in her losing her core memories. She is a jealous person, especially of Guest. Crystal is depicted on screen with dark, voluminous curly hair and brown eyes. Her wardrobe leans into a dark, expressive aesthetic, characterized by layered streetwear and her iconic brown trench coat, which is covered in personalized scribbled words and song lyrics that reflect her inner turmoil.