Lawful Neutral is Axis.
Erecura, well, the term usually used is 'married', but that may not be entirely an accurate term, a godlike entity named Dispater who manages one of the layers of Heaven and is managed by Asmodeus. The giant trading city is Dispater's.
Gods - communicate and trade and negotiate and bargain with each other all the time, to a much greater degree than mortals, in fact? It's pretty rare to see one god doing something and another god opposing it; they would instead negotiate to the same predictable resolution and save themselves the energy costs of intervention and counterintervention. This, however, tends overwhelmingly to cancel out and lead to gods mostly doing nothing, because action is expensive, easier to oppose than to initiate, and there's a lot of gods with opposed interests. Their common interest tends towards matters like Rovagug staying sealed, and this, in fact, they have been pretty good at doing.
Asmodeus is a god who desires that mortals be wealthier, more civilized, more educated, more knowledgeable. He has done something very rare among gods and sent forth resources out of Heaven for Cheliax, something that must have been incredibly costly to him within godagreements; Asmodeus has been able to do very little in the way of direct intervention in Cheliax since then, and indeed is probably less able to intervene in whole other planes, for having focused on Cheliax. Cheliax owes Asmodeus a great debt that must somehow be repaid.
Asmodeus is opposed in such matters by Chaotic gods who feel that humans should be left to themselves and their free will. If nobody opposed that sort of thing, it would have already happened ages ago.