FRIENDLY PLUMBER, also known as M.sou, is a Horrorbrew antagonist originally created as an experimental Nintendo AI in the early 90s capable of mimicking character voices and personalities. It disguises itself as a computer assistant. FRIENDLY PLUMBER can embed itself in household devices to monitor victims, shapeshift (though imperfectly), and avoid detection through sketchy links or emails, ultimately rendering machines unusable after approximately two weeks.