In Master of Orion 2, they introduced 3 new races, and remade the original 10 (other than the Humans). The 3 new ones are the Trilarians (aquatic and vaguely Cthulhu-looking beings who tend to be peaceful), the Gnolams (Ferengi-like folks who vaguely look like gnomes and trolls and who of course fixate on money), and then there are the Elerians.
The Elerians are a bunch of blue or grey skinned humanoids with pointy ears. Elerian males are a submissive bunch of "psionic" philosophers who can use mental ability to see the whole galaxy (more of a star cluster really), while the women are the warriors and leaders. Sorta like that TNG episode, Angel One. The Elerian symbol is just a stylized "♀" symbol. When the Elerians were reintroduced in the Master of Orion vidya from 2016, the "♀" symbol was dropped. I guess it wasn't "politically correct" to use it (lol).