She was originally conceived when some sort of sex/affection-related demon had sexual relations, in secret, with a female fairy who was fairly high-up in Neil's chain of command. This fairy was also the mother of Orion, who became Merynis' half-brother and good friend. Neil exiled the female fairy for directly disobeying orders that he had made, notably being vows of chastity for his high-rankings fairies, and to not cohort with demons, as demons had recently been directed as attack forces to Neil's planet in the Separ Dimension. Despite Merynis being the offspring of a demon, she was still part fairy, so Neil treated her as such. She was, however, quite a rebellious person at times. And, though she did not know it, she had the ability to gain energy from love. For this reason, Neil wanted