One of the Medal Midnighters and Fathers of Music in the Music Room.

Mako, Miko, and Mutsuko are three young girls visiting St. Claire Elementary, a school filled with strange legends. They have an abrupt encounter with Kunstrijk, a human body anatomy model, and Goth, a skeleton model. Both haunt the soon-to-be-demolished science room. Seeking revenge for being vandalized by the three girls, Kunstrijk invites them to the school's midnight party in order to scare them. Together, the five go on a quest to collect three mythical medals that can grant a wish and hopefully save the science room.
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(Source: Anime News Network)

Johann Sebastian Bach