Mister Demi has white shoulder-length hair, with small black horns, and two pencils on the top of his head, and wears black glasses. It can be noted that his left bang bares a resemblance to a piano. 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, and still makes sure the students are following the rules. He's the music teacher