To @Antvasima
1) Oh, deconstruction, I see.
3) Well, I read again the whole series and I think she's really a concept. But about this, three things can be done: Option 1: To add abstract existence and later remove it if in a later story she's not treated as an abstract. Option 2: To do exactly the opposite of what was proposed in the previous option. Or option 3: To add abstract existence, but not alone, but with a "possibly". I lean more for option 3 or 1. Also, personally I think it's not necessary not to add Nyx thanks to the uncertainties because there are not enough like to think that she's a complete mystery. There is enough information to make an accurate analysis, I think. And I promise to make a good editing work, since I'll watch the source pages of other profiles to guide myself, and even I'll post here the definitive draft of her profile, so everyone can see how will be and tell me if there's any mistake, That way I can avoid any mistake when creating it.
4) You're right about this, I'll change it.
5) Not really. First there was darkness, and Nyx was born during that darkness. Later, the first stars appeared, and then there were many more stars, probably the galaxies had already formed, and even after that, Zeus was born. In any case, Nyx is like millions of times older than Zeus, since Zeus is the son of Gaea, who isn't older than Nyx.
Whatever your decision is, I appreciate that you take the time to analyze this. You have been quite helpful.