Board Thread:Wiki-Related Discussion/@comment-6302057-20171016050848

Consistent with on-screen information and the stories on which they are based, Zeus, Hades and their father Kronos originate from the dominion of the Greek gods, Mount Olympus.

However, Poseidon, one of the "big three" gods and brother to Zeus and Hades is not included due to lack of on-screen or canon references. Poseidon is instead listed as an EF character. Similarly, the sea goddess of old, Ursula is listed as an EF character. However, in the cases of both Poseidon and Ursula, I believe that there is a severe lack of any backstory that allows us to credit them as EF characters. As there is also lack of evidence to list Poseidon as coming from Mount Olympus (though a logical conclusion), I propose that we list Poseidon and the sea goddess Ursula as neutral characters. 