That's not a mask, that's his actual face. That's my theory, anyway. I think he is not exactly an Exo, but rather... a human shaped being created by the Traveler. Kinda like a Ghost, but in human form. He probably can pull his extremities apart, like ghosts do with their shell. It would be cool to see him naked. ... I mean that in a non perverted way... [spoiler]But also in a bit of a perverted way because i LOVE masked guys and the Speaker is lovely ( ͡° ͜ʖ ͡°)[/spoiler]