Piano Ghost

ピアノお化け

The ghost of the German composer Ludwig van Beethoven. He haunts a piano of the old school and curses people through the song Für Elise, stating that they will die if they hear the song four times; he can accomplish this by making his victims hear his song through various objects, even ones that couldn't normally play the song.

Momoko (being possessed by Kayako), sealed him inside a metronome.