The Phantom of the Opera
The Phantom of the Opera was a character in a musical and novel of the same name. 

The character was described by The Doctor as being "a tormented character who was soothed by music." In 2377, he named a member of an unknown species "Fantome" after this character, as music appeared to have a similar effect on him. ()

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de: Phantom der Oper
Phantom of the Opera, The