Dr. Franken Stein is a muscular man with silver-gray hair, round glasses, and a screw in his head. He wears a white lab coat over a grey turtleneck and black pants. A genius meister, he's highly skilled with various weapons, particularly scythes, and is also adept at hand-to-hand combat. His fighting style incorporates his soul wavelength and his weapons. As a DWMA instructor, he's known for his eccentric teaching methods and sadistic sense of humor, though he genuinely cares for his students. He is exceptionally intelligent and skilled in medicine and surgery.