Character profile
Piano Ghost
ピアノお化けBiography
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.
Story spoilers
Momoko (being possessed by Kayako), sealed him inside a metronome.
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