If he doesn't show up in the next episode, I don't think we'll see him again in person. Even if he has so many kids that he can't really remember any of their names, the fact that any Ars Goetia got banished would be enough to get his attention. Plus, considering the next episode is called Sinsmas, a play on Christmas, and most christmas based media has family elements, it wouldn't be a stretch to say that Paimon might show up next episode. But if one of his kids getting banished and (in Paimon's eyes) becoming a disgrace to the Ars Goetia isn't enough to make him show up, he probably won't be coming back.