I have a feeling that last panel of the key and ring touching would end up meaning something, since it seems ali or whatever his name was again was quite keen on finding out about said ring and doorway for some reason
Wait, does this mean they'll also be gaining the same abilities that they have in the game? Will we also get to see Piko once more? Maybe even a second Ichi will arrive at some point!
I wouldn't say that he was Iruma's dad but more like just some distant ancestor, as Im pretty sure that the demon king has been missing for like hundreds of years by the time the story takes place