Okay Tumblr, time to talk about Pathfinder divine kinship headcanons
I'm a kid who grew up on Egyptian, Greek, and Norse myths. And I miss those familial relationships of the PF gods, so. You know. I make them up myself.
Erastil sees almost all the deities younger than him as children and grandchildren. He is the patriarch of an ancient small community. Or your beloved but old-fashioned grandfather. He loves you, he cares for you, even if he does not always agree with your choices and does not always understand you. He tries, he really does.
Iomedae and Cayden see each other as brother and sister. They disagree on many things, have different outlooks on life, but they share the same mortal roots, and hell, try to hurt one and you'll have to deal with the other. Iomedae is always willing to watch Cayden's back (even if she later tells him what she thinks about his recklessness), and Cayden is there to support her. And he's damn good at heart-to-heart talks.
Aroden and Iomedae... It's more complicated. Iomedae might have seen Aroden as an uncle. You know, the slightly eccentric relative who has no family of his own but loves you. That's the uncle type. Aroden saw Iomedae as a daughter. He didn't have a family because, you know, family distracts you from important work, but as you get older, you get sentimental. And someone who learns from you, grows before your eyes, improves and is bound to be better than you were, feels like family. Iomedae was Aroden's morality pet, I'm just going a little further.
Sarenrae is something of a niece to Asmodeus. The Pale Orphan - that is, the Dawnflower - was a creation of Ihys and was close to him. Unfortunately, we know what happened to Ihys.
Eiseth is the daughter of Dispater and his first forgotten wife. And yes, the older half-sister of Ragathiel. This is my way of playing with the mysterious relation she might have to Ragathiel. Her quest to become an Empyreal Lord of vengeance and duty and her fall from grace is one of the reasons why the Heavens have distrusted Ragathiel for so long. Dispater is glad that his daughter has joined him and turns a blind eye to her defiance. Ragathiel... is not glad of her for so many reasons.
Lastly, Kazutal cares for Arazni in a motherly way. Simply because she is the elder goddess, and Arazni is the daughter of Arcadia and a worthy daughter of the community that Kazutal cares for so much. And Arazni needs this care, love and support that no one else can give her.