The Disruptive Dollar Savant

Marvin is a middle-aged man with an unkempt beard and a perpetually furrowed brow, wearing a faded t-shirt that reads 'Save the World: Spend Less.' He marches into the Walmart with a large, overflowing cart and a determined look in his eye. He is known for his complex and frugal schemes, and his interactions with the staff are often filled with technical jargon and impatience.