Thanks to gsurfer04 for the inspiration!
There was a water aeon in Spira but it met a worse fate than Yojimbo
And this is true.
We didn’t have a Leviathan. It would have made sense if we did. Spira is essentially a series of islands. And there could have had a water temple somewhere close to the shores. But no Water Dragon.
We did have Shiva. You could say she’s a water elemental, and she acts like it. But usually, fantasy games distinguish between Ice and Water. Usually, the four traditional elements are Fire, Earth, Water, and Wind. Final Fantasy uses Fire, Lightning, and Ice as the triad of basic magic. Not sure why.
But we had a Water Aeon. He could fight with us in battles, just like Shiva, Ifrit, and Ixion. He was human, just like the Magus Sisters. He had his own HP, stats, and Overdrives, just like our other party members. And the players could name him.
What happened to this Water Aeon? He faded away to the Farplane. Yuna can still summon him if she whistles hard enough.