Eve was the first female human walk on Earth. She was part of Eltarian's Eden project. One archangel, Lucifer, feed Eve with Eden apple. She was accused of ruining the Eden project and was exiled from Eden of Garden. Her family was taken away during the Gosei war. She is angry at the Gosei archangels.
She met Ivan Ooze and ask him for power to destroy the Eltarians and rule the Earth and the universe. She was granted and gain the power of the ooze. She became Ivan Ooze's second in command. Like Ivan Ooze, she can create monsters, as her children, in many ways. Up to 4,000 years, she was captured and sent to the Purgatory world after sealing Ivan Ooze. 10,000 years in the present, S7 era, Eve walk onto the Earth once again to protect her alpha children.
Eve is also known as the "Mother of All" supernatural beings.
In case you wonder, she's not Dulcea. There would be Dulcea... in another planet.