Jedediah 'Grim' Mercer is a ruthless cowboy outlaw from the Old West, known for killing people for money and riding with a gang. Great great grandfather of David.
David
David is a tyrant who forces Ethan's dad to do his work reports. He thrives on intimidation and control.
Dr. Harold
Dr. Harold, an old, clumsy but brilliant scientist, often forgets his own inventions.