Mario's good ol' brother, Luigi?
Hm. Afraid of ghosts, so he might be marked by the End. As for what he would serve under, that a bit tougher, though now that I think about it, he might be slightly aligned under the Lonely, mostly because of his constant lack of recognition by anyone, and the running gags of his own name being forgotten throughout the series. I'm not sure though. He might just be marked by that as well.
If I'm going to be honest, luigi doesn't really seem like he could easily fall into avatarhood in the first place. Is that to say that he would, in the hypothetical scenario of him existing during the eyepocalypse, be stuck within a domain? Yes. But, sometimes it just be like that.














