Heck yes!! I'm absolutely here for this, and for any brainstorming sessions or ideas that might jump out to you over time! I would be so down to have Paimon interact with other "complicated antagonistic characters"; I've been playing him a couple of years and really been able to extrapolate some characterisation out for him, but still tried to keep that Hereditary Ambiguity to everything.

He's largely still a scrambled mess that can go... so many ways, so it's always fun to see how he'd react to various characters. I'm super canonblind but just from peeking at things here and there, I've seen that demons/demonic-esque-things are a part of JGY's canon?? So that could definitely be Very Interesting.