Originally Posted by
Enkidoh
Menphina is worshipped fittingly by the Keepers of the Moon miqo'te, but they're more of a minority compared to their Azeyma-devotee Sunseeker kin, although it's unclear how deep that is given most Moonkeeper npcs tend to be solitary sorts, or random brigands, and no actual Moonkeeper communities have been seen (no those bandit hideouts in the Black Shroud do not count). I'm not sure but it would not surprise me if there were also a few acolytes of her among the elezen (specifically the Duskwight), given their preference for dark spaces and how Menphina's deity stone is in Coerthas overlooking Ishgard. As for the other two, worship of Nymeia was briefly forced on Ala Mhigans as the 'only supreme god' by Mad King Thedouric in the last years of his tyrannical rule, but it's not clear if any remained devoted once he was toppled (and in any event Gaius specifically forbade any religious worship during the Garlean occupation.).
I think now Nymeia is mostly just evoked by gamblers and the like as an Eorzean analogue for "Lady Luck", but otherwise has no structured devotion. And Althyk I'm pretty sure Sharlayan holds in high regard, as Louisoix specifically evoked his power to send the original Warriors of Light forward 5 years into the future during the Calamity (you can just make out Althyk's symbol appear on Louisoix's hand during the End of an Era scene, and the WoLs return 5 years later at Althyk's deity stone in Snakemolt in the Black Shroud (whether Amdapor worshipped him and thus Louisoix specifically put the deity stone there for that reason is a very good question).
Either way, it's going to be interesting to see how Myths of the Realm will depict them going forward and whether there will be any reference to this lore or not, although my gil is yes it will, but, we'll see. :D