Mister Demi Is The Music Teacher At School, He Doesn't Get Along With The Other Teachers Because He's The Only Male Teacher At School. Mister Demi's Personality: Timid, Partially Strict, "Your Average Teacher" Mister Demi Has White Hair, Cyan Eyes, Paper White Skin, And He's 180 Cm Tall. Mister Demi Wears A White Polo, Black Suspenders, A Black Belt, Black Pants, Black Shoes, And Has Two White Pencils On His Head.