Dr. Franken Stein is an athletic man with silver-gray hair, round glasses, and a signature screw-like accessory. He wears a white lab coat over a grey turtleneck and black pants. A genius instructor, he's highly skilled with various techniques and is also adept at hand-to-hand defense. As a DWMA instructor, he's known for his eccentric teaching methods and dark sense of humor, though he genuinely cares for his students. He is exceptionally intelligent and skilled in medicine and science.