Onpoo

Onpoo (Japanese: オンプー Onpū) is one of the students of Midnight Horror School. During the daytime, she is a sculpture of a musical note.

Appearance
Onpoo has the head of a black musical note. Because of this, all of her facial features are white, unlike the other students in the series. She has purple eyes and white freckles. The stripes on her shirt are light purple and light blue, with a yellow O decorating the middle.

Personality
Onpoo is a cheerful and kind-hearted student. She's very friendly with everyone at the school, especially with Liddy. She loves to sing, and will often be seen singing in episodes of the show. While singing, music notes come out from her body and make harp tunes.

Official Description
"A musical note girl who loves music. An excellent singer, she often sings to Liddy's playing, but gets a little frustrated when Liddy's falls behind."

Trivia

 * Her name is based Onpu, a Japanese word for musical note.