Mark is a mannequin with an entirely wooden body, except for his legs which are a dark gray stand. He has a face resembling a default expression and wears a green or yellow hard hat. He is a passionate builder who loves wood and will build whenever he gets the chance. Mark has a distinct Southern accent and a mutual hatred for another character named Wallter. He seems to have a humorous, if not slightly clumsy, disposition, chuckling about past incidents like getting nails stuck in his head.