Some followers of Monotheism, especially among Star Elves and Asguardian Dwarfs, believed (and still do in the times of the United Planets), that the Creator God is strictly a female deity.  This began with Morrow

Although belief in the Mother Goddess was originally mostly confined to the Asguardian Dwarfs, Thamar, a female Star Elf, spread belief in a monotheistic goddess to Alfheim.