Yin

"'So what if I'm not some almighty space ghost like my Dad? Does that make my existence mean any less?'""-Yin"Yin is the human daughter of Noire and Nahkriin, and the twin sister of Yang.. Her conception was orthodox, resulting in no superhuman ability. She is a part of a what-if story revolving around Noire and her true desire for maternity. As calm and serene as her mother, she keeps her brother Yang's shrill tongue in check.

Appearance
Yin sports long black hair, more void black than her mother's purplish-black. Her eyes are a light grey, almost white. In the what-if story arc "A Doctor's Children" she is seen wearing a white short-sleeved shirt, complimented by ash grey shorts and shoes. She also seems to be wearing a black backpack for some reason. Because she is only human, her features do not change and she undergoes no transformations.

Personality
Yin is a quiet, kind-hearted young woman that makes no mention of her past, as it was all chronically skipped anyway by her father. Taking after her mother in more ways than one, she speaks only when she feels she needs to, and spends a lot of her time trying to cover for her brother Yang, who also speaks when he feels but is more subtly crass with his tongue. During the entirety of the only arc she is featured in, though, she only leaves the Aether twice, so there is not much information on her.

Biography
Yin and Yang alike are descendants of the Greek Doctor Noire but are only a mirage of the Aether caused by Nahkriin to appease them both: Nahkriin was finally able to at least pretend to settle down with Noire, and the Doctor was able to simulate motherhood as she desired. Upon her waking, she is met by two smiling faces, who then reveal themselves to be her twin children. Throughout the arc, Noire spends time with both Yin and Yang, teaching them about herbalism, chemistry, and spearfighting. The two then go to Earth to have a brief adventure but are attacked by a group of bandits. Assisted by Nahkriin, Tai, and Tai's daughter Zoelle(everyone being fabricated except Nahx and Noire) who happened to be travelling that way, the party meet up to gather ingredients for not only Noire's medicines but also to prepare her a heartwarming dinner. The arc ends with Yin and Yang accepting their non-existence and asking Noire to promise to continue her studies.