The Organ Grinder is the main antagonist of the Cat Piano and is depicted as an insane criminal who kidnaps anthropomorphic cats for use in a torturous contraption known as a "Cat Piano" - which has sharp nails connected to each key, which when played hammer into the tail of its victim: causing them to screech
in pain.

The Organ Grinder kidnapped a feline for every key in the piano and began to play the device, their screams of agony becoming his "music" - however, the other cats revolted against the madman and invaded his lighthouse, killing him and setting his victims free from the device: which they in turn torched to the ground.