Who is the many-faced god in Game of Thrones?

Who is the many-faced god in Game of Thrones? The Many-Faced God (alternatively known as the God of Death) is a deity worshiped by the mysterious cult of assassins known as the Faceless Men, who are headquartered in the Free City of Braavos and they believe that through their assassinations they do his work.

The Many-Faced God (alternatively known as the God of Death) is a deity worshiped by the mysterious cult of assassins known as the Faceless Men, who are headquartered in the Free City of Braavos and they believe that through their assassinations they do his work.