"Yes. Golarion is a neighbor to the Outer Planes. Velgarth is not, my summoner doesn't think. The Outer Planes have a metaphysical nature along two different axes, called Law and Good. Actions taken in Golarion or here can strengthen or weaken the forces of Good and Law in all the worlds. Law is - honor, duty, honesty, discipline. Its opposite is chaos. Chaos is - doing things on impulse, freedom, unpredictability. Good is - love, mercy, protecting the innocent, fighting evil. Evil is - torture, slavery, fighting good.
We have nine Outer Planes, for every possible combination of them - Lawful Good, Neutral Good, Chaotic Good, Lawful Neutral, Neutral, Chaotic Neutral, Lawful Evil, Neutral Evil, Chaotic Evil. When mortals die, they go to the afterlife associated with the choices they made in life. When they are alive, if they are powerful, you can read off of them, by looking, which ones they are. This is useful for coordinating the war against Evil, and in Golarion it is widely used to know who is trustworthy. I only answer summons from Lawful Good summoners so I know my summoner was not secretly a bad person. Vanyel is Good but not Lawful or Chaotic. None of you are Evil but I don't have the magic to check all by myself what exactly you are, aside from that you are not Evil.
I am a creature of the Lawful Good afterlife plane. That means I am by my nature Lawful and Good. I cannot betray my word or forsake my duty or permit or participate in Evil. It is impossible for the kind of creature that I am. So we are good emissaries among peoples who care about Good and Law. My summoner said that in Valdemar they do, though they do not know the concept."