What do guardians do?

[SenorPatty]

I think there was this bit in SB with Lyse?? talking about Rhalgr but other than that and the casual "Thal's balls!" that seems to be in many a Uldah denizens' vocab, there doesn't seem to be a focus.

[CaptainLagbeard]

Nowadays it's just flavor text for your character, it has no gameplay impact.

It used to very mildly affect elemental resistances, but they didn't really come into play even at the release of ARR... Don't know if they were more relevant in 1.x.

[Mizore_Canaan]

I do like the detail of choosing a deity, even if it doesn't actually affect anything - though I'd like the ability to change it somehow, even if it took a Fantasia to do so. One of my characters has shifted from the original concept I had when creating him, so I'd make a different choice now if I could, but he's stuck with it.

If you use a Fantasia you can change it though

[Iscah]

If you use a Fantasia you can change it though

Can you? I only used a Fantasia once but I don't remember having access to the extra customisation bits like their base class.