Phantom of the Opera is an Assassin-class Servant.
In the Shinjuku Singularity, he shows up as a Berserker working alongside James Moriarty, EMIYA Alter, Yan Qing, and Hessian Lobo as part of the Phantom Demon Alliance. He's holed up in Kabukicho, where he commands a small army of Coloraturas—humanoid dolls he's created. His most notable creation is Christine Daaé, a Phantom he's placed inside one of these dolls. The whole setup is distinctly unhinged, and he uses the Coloraturas as both soldiers and vessels for his obsessions.
Content compiled by AnimeList.moe from publicly available sources.
