Mouseferatu
Hero
Unless we rule out meta-game considerations, such as Xykon being the primary villain (or at least one of the main villains) and so on
But why on Earth would we rule those out? This may be a story about a game, and I know people like examining it from a gamist PoV, but it's still a story first and foremost. Story considerations should (and have, in the past) trumped game considerations each and every time they've come into conflict.