Niang-Niang

Niang-Niang (娘々(ニャンニャン)) is a "bizarre magician", a Magic God, who dwells in a territory beyond a certain layer of the world.

Etymology
In Chinese, the term "Niang Niang" (娘娘) is an old-fashioned and respectful term for "mother." There are a number of Chinese goddesses that are sometimes called 娘娘, including, but not limited to, both and the, but more commonly designing , a  goddess of fertility.

Appearance
Niang-Niang wears a short white China dress with very baggy sleeves, a hat and a unique charm attached to her forehead. She has an extremely pale complexion, black hair and green eyes.

Personality
Not much is known about Niang-Niang, but she is apparently playful in nature, with her often ending with a star character (☆) to indicate this.

Background
Niang-Niang's past is largely unknown, but she is a of ancient China.

Magic God Othinus Arc
In that world where distance and time doesn't matter, destiny's hand has moved and allowed Niang-Niang to meet with Nephthys and the High Priest to discuss their plans after the events that have transpired between Othinus and Kamijou Touma. She is apparently mad at Othinus for doing whatever she wanted in the existing world while they are all stuck in there.

Niang-Niang and the others later find Aleister Crowley ripping a hole in the fabric of the realm, which would mean that they could now appear in the existing world. Aleister later attack these "bizarre magicians" after they enrage him, though it is likely this was his purpose from the beginning when he entered the realm.

The battle witht the magic gods leaves Aleister's body terribly damaged. However, the attack was all but a ruse to allow Aleister to kill them, switching the spell that Zombie (another magic god) had, which would allow magic gods to go to the world of humans without affecting it by the sheer power of their existences.

St. Germain Arc
With their Hidden World lost, the High Priest, Nephthys, and Niang-Niang descend into the human world after using Zombie's spell, unaware that Aleister has already played his hand. They arrive just in time as St. Germain begins his antics in the Dianoid. Despite really wanting to interfere, especially since Kamijou Touma is in the the Dianoid as well, they are unable to do so as they are still too powerful to do so and would've likely destroyed the world in the process. Much of their actions is just walking around Academy City and observing the events that are unfolding with regards to St. Germain.

After St. Germain's defeat they are ready to interfere with Touma's development. However their plans come to a standstill when Aleister Crowley communicates with them. They once again mock him but they are suddenly skewered by stakes through their chests. Shocked that they could be harmed, Aleister Crowley reveals that he had swapped the spell Zombie used to allow them to be in the world without destroying it with his own, allowing them to be vulnerable to him, and declares that he no longer considers them a threat. At that moment, Kihara Noukan catapults the body of Zombie, crucified on a steel cross and wrapped with barbwire, into their midst.

Character Art Design
According to Haimura, he based Niang-Niang of his generation's : Lei-Lei from the Vampire series, known to the English speakers as from the  series.