The narrator speaks in the third-person and doesn't occupy any particular character's point of view. In fact, he doesn't even have much to do with the characters at all. Most of the time he's more interested in describing the setup of Prospero's party (creating the "atmosphere"). He prefers taking a "bird's eye" view of the crowd of revelers to lodging himself in any of their heads, though he does take a few quick peeks into Prospero's now and then.