Lore Question: How much Power does the guild have if Kingdoms exist?

I haven't asked Alot of questions on lore but I always wondered this because of Elgado. With stuff Guild Knights permission to kill Poachers, Monster Requests, and how to deal with Black Dragons existence. Does the guild have any power when foreign bodies enter the scene? Elgado basically has hunters called knights, and possibly have they're own different way of dealing with monsters.

Does the guild attempt to build relations with these Kingdoms or try to explain they do things? Do they have power to influence? I'm down with theories and speculation on the Powers the guild has.