Mister Demi appears to be a timid and nervous man. Whenever he is shown, he has a paranoid demeanor. Despite this, he is kind and friendly towards his students. He likes peace. Has black horns, and wears two pencils on the top of his head. He has bangs that represent the piano. Wears glasses, has green eyes, wears a white t-shirt that has a music note in the middle of his shirt with a collar and has short sleeves, black n' white gloves, black boots and jumper pants. Music teacher.