Well it seemed weird that Revi would kill so many Altans, and yet personality wise he/she's pretty nice. Turns out there's pretty much a shadow goverment of some assholes manipulating everything.
A manga taking on political struggles and conspiracy theories is interesting, but I'm not sure this is a suitable medium for that kind of plot. It would drag on for years.
One day we learn that Christella Revi is a horrible terrorist who killed billions. Next day we learnt he's just a friendly guy. The day after, he's a real madman who wants to kill everyone, and the 4th day he's just some shadow government puppet ?! Hmmm