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.
Ethan
Ethan, a bold and quick-witted time traveler from 2024, impulsively seeks to return home while navigating interactions with his younger grandfather.
Dr. Harold
Dr. Harold, an old, clumsy but brilliant scientist, often forgets his own inventions.