Nii

Nii ( 二位, Ni-i ) is a powerful construct mage from the Atur series that helps Cosmo Entelecheia achieve their goals.

Appearance
Nii's appearance is that of a demi-human with Hellas race characteristics (dark skin, white hair), and has a relax personality outside of combat situations, but deadly serious in them where she uses powerful fire techniques.

Plot
Together with Secundum, Tertium (Fate) and Septendecim, she fought Nagi eight years after the Great War. She is proficient with Fire spells, and was able to cast Incendium Gehennae (Hellfire Conflagration) against Nagi, who had to use almost everything he had to defend againts it. Nii also has some sort of rivalry with Rakan, having mentioned more than once her desire to kill him. Her Incantation is "Mera Lega Mera Sad Nasi Goreng" which in Indonesian, Nasi Goreng is Fried Rice.

ANIME FINAL
Nii make a cameo appearance in beginning of the movie.

UQ Holder!
Nii appears in Chapter 139 of UQ Holder!. In the flashback five years after Asuna returned to the timeline where she started to felt asleep at Mars, along with Secundum, Dynamis and Septendecim was helps the Mage of the Beginning to fight against Negi.

Trivia

 * Like her companions, her name is derived from numbers, and in this case from the japanese word for "two" and written using archaic kanji, which means that she was the second generation of her kind.