Oomf i think we got a misunderstanding here with the way i worded myself, my bad.
From my previous reply, while yes the 13 crowns also rule the underworld, i was just replying to OP as quickly as i could so i was unable to mention that. But ig the first part was meant for you, Slime, since a quick google search (this is what im referencing hehe: https://mairimashita-irumakun.fandom.com/wiki/Babel_Tower) would show that the Demon King’s position is separate from the 13 crowns, and you’re right that currently 11 of them are known since Poro dipped and another hasnt been introduced yet was what i was trying to say,, But i was also referring to OP about possible 13th student being Amelie as best candidate to make up Misfits’ 13 crowns since there’s 12 of em excluding Iruma...
So ye, my apologies for the confusion ?? ( ̄∇ ̄")
So I was thinking that they might get a new student because if and it’s a really big if, Iruma-kun is supposed to be the demon king and his classmates are the 13 other demons then they should have another student but that’s just what I was thinking because everyone is slowly becoming stronger and I’m not saying that all of them will become apart of the 13 demons but maybe some of them will.