The Creator is a child, not a god. He fell to his death, was revived with magic that stayed with him and he created 13 creatures because he was lonely.
I think God is just leetspeak for "higher lifeform." In the game, "Gods" are contextually far more suited and magical a term that compliments the story, so that's my thoughts on them.
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Even the Creator God himself was a child that was corrupted and distorted after years of loneliness and failure. It was only his merging with an ancient spirit after the attack on the Skyhome that gave him influence over the waters in the first place.
Don't think anywhere I stated anything other than what you said in your post, nor anything not stated in the game.

Naija is no God either, nor a demigod. She simply has powers, stop making things divine. Durrr, *witty divine soup reference here*
As thus her child isn't a quarter god either, though he's sure to have powers
Naija I'd reckon is just a very powerful lifeform, and nothing more.
derp.
As to the reference to Naija being smarter than other Mithalans; it's not because she's special, nor because she was Mia's daughter/creation, but because she was EDUCATED by Mia. She would've just been a feral creature otherwise. If you don't think that's so, go figure this, how does a creature that does not know language think?
No-one said anything about her being smarter. I did mention though her having a more profound connection to the verse, seeing that she was born of a creature that was created using the most potent uses of the Verse.
Furthermore, Mia wipes Naija's memory, so anything Naija was taught was forgotten. Naija lives as an otherwise feral creature afterwards until Mia starts to send her on her quest.
Also bear in mind that language is not coherent, concise words and complex structure. Some animals have highly developed language. Most have language that is based on the transition between instinct and reasoning. A thought is just expressing and processing
any sort of information and deciding how to act. It's that blurry line between instinctual reaction and reasoning (on any scale) that becomes thought. And that communication is also language.
Ultimately; almost all animals are capable of thoughts on varying degrees in varying species.
Then to Mia being made as the creator's equal, this isn't so. The creator wanted Mia to be better than him, seeing she was made in the image of his mother. Now what child does not look up to his mother? Not with the obvious evidence of missing her so that he spread the verse of the song she sang through everything.
As for Mia's God status, well as said, I don't think the "Gods" were Gods as much as just higher/superior life-forms, but one thing is clear that Mia was created as the most equal creation to the CG. I think it's more the case her independent, self awareness and human-like intelligence being the element that allowed her to evolve more than just a simple beast like the others were based on, and hide herself and evade the CG to work her own agenda.
There was only the mention of equal purely because, being the creator himself, the CG can't make anything more than himself, bearing in mind he's not technically a god, nor magical in his own right either.
As for the skin, it could be possible she has a combination, but it's unlikely. The darker pattern doesn't prove anything either seeing orca's, whales and etc. have patterns as well.
But those are cetaceans, and cetaceans are mammals.
Naija does not breathe air.
Besides, as a fictional underwater creature, I think people should and are entitled to interpret and speculate as they wish here, especially when there is not defined truth.
That'll be all, feel free to prove me wrong on any of the subjects.
BIGASSPOST.

That said, I think you're looking too much into the semantics of it all. A lot of what I said (I haven't read all the posts here so can't speak for them) didn't actually dispute what you or the game said, and a lot of terminology was just personally used to interpret the same things.
The game is alot less precise and gives room for lots of interpretation on the same thing.
That said, I see no harm or wrong at all for other to interpret or hold the game and its concepts in their own, personalised way. It's absolutely a credit to the game if it's open enough for people to make their own assumptions and beliefs, it makes the game and story experiences that much more potent and personal for them. Which is a mark of an incredible game

EDIT: Aquaria: SERIOUS DISCUSSION! xD
Gezellig, he?