that is entirely different and you know it. Mephisto is and has been an active member of demon society and part of their ruling class the 13 crowns since at least when delkira was on the throne. He isn't some past ruler that died or vanished and came back. He is a CURRENT power in the world.
It is indeed different, but slightly and not entirely, because Mephisto regained a powerful position before trying to clash with Baal's faction pawns not so long ago,
at the Deviculum.
Now he is indeed an active member of upper echelons of the Netherworld society, but is called Mephisto, not Mephistopheles
as he was called by the previous Demon King; literally wasn't active during Delkira's rule (
proof of how he told us, readers, that '...for some hundreds of years after that, I was removed from the Game Board at the pinnacle of Netherworld.') and literally
materialized himself only after
receiving a letter about the 'Trickster plan' of the Three Greats.
So, if you don't remember something and don't care enough to re-check, just don't try to make other people look like they're dumb. Bye.