@JesterFreeze @rennov
For those of you who don't remember, the "alien" is a reference to Chapter 55 ("An Alien's Fate"), when Baku meets Leader in the Hangman game: https://mangadex.org/chapter/204634/1
In that chapter, Souchi comes in and plays a joke, claiming that he's an alien coming to invade the earth. If he's playing the same joke as he was in his previous self by pretending to be an alien, then it looks like he's gotten his memories back. I'm guessing this is also his way of signaling to all the referees, who may be familiar with his joking style about being an alien, that he's regained his memories. Hence the look on Shion, Yakou and Nowa's faces in this chapter.
Here's my question: if Souchi only loses his memories when he feels like he's "failed" at something or otherwise done something imperfect, why did he lose his memories right after the Tower Gamble? What happened that cause him to lose it all?
Also, it looks like this is the "138th" time he's lost his memories, including "the small ones"? I wonder what those other instances were that no one but him knows about.