Mister Demi is a minor character featured in Fundamental Paper Education. He is a music teacher at Paper School.

"These teachers are also kind to their students! However, they love peace and they don't like you making loud noises in the library." - Kaaatie

“Uh, hey there, students... hope you’re all feeling, um, ready for music today? Uh, just, um, make sure your pencils are sharpened and… your notes are in order? I-I’m just, uh, I’m just kidding! But, seriously, let’s keep it down and get, uh, organized for class. Today, we’ll be diving into some really... harmonious stuff.” nervous chuckle