Extra dialogue about Diabolos

I noticed after you beat lost city you can talk to E-sumi-Yan and Raya o Senna for a lil bit of extra dialogue.

The following is me just speculating out loud.

E-sumi talks about how Amdapori's enemies summoned diabolos with dark magicks, but Diabolos was sealed by Amdapor's mages in the end. So assuming he isnt a primal I am curious if he can come back since he had a body and itsn't made of ather like primals are.

E-sumi also called Diablos a king among demons which makes me wonder if there is some type of civilization of hierarchy in the void.

Spoilers for all Main Scenario.

There has been speculation that we haven't seen the last of him since he has the "fleeing bats" effect when he's defeated. I see all these less-than-a-primal bosses as, like, the Balrogs and Shelobs of FFXIV. They are the evils that are out there. For whatever reason. Diabolos is probably tied to the void. We've seen it expressed that summoning primals and summoning voidkin is different. I do not believe that we have definitive confirmation that The Ascians are from the void, but you could make a compelling "guilty by association" argument. How many times do they summon voidkin in the main scenario? We see the Ascian "home" as a dark place. Zodiark is a dark Mothercrystal. In 1.0, one of the Paragons seen as a sort of grim reaper type being - very voidkin-like. I'll be interested in seeing if their is a hierarchy of voidkin and if The Ascians are at the top of the food chain. I really hope that we get more story on the nature of the void.