Aino

was a servant of Tenji, the emperor of the Land of So. On orders from his emperor, Aino became Kaguya Ōtsutsuki's personal attendant when she first appeared on Earth.

Background
Aino lived a full millennium before the start of the main story. She worked as an the attendant of the emperor of the Land of So. After arriving on Earth, Kaguya was made Tenji's concubine and ordered Aino to serve as Kaguya's personal attendant who appeared to be more open with her than she was with most sharing information about the God Tree with each other.

After some time, the Land of Ka began harassing the Land of So and subsequently began to demand ownership of Kaguya. To protect her, Aino led Kaguya into hiding but when they were attacked, Kaguya protected Aino and fled with her.

On the run, Aino was protected by Kaguya until they reached the God Tree. Aino soon realised that Kaguya was in the early stages of pregnancy causing her to be weakened. Without a second thought, Aino sacrificed herself to protect Kaguya and her unborn children. Her death visibly horrified the usually stone-faced Kaguya.

Personality
Aino was a dutiful and compassionate young woman, caring for Kaguya and her unborn children with her life. Kaguya appeared to care deeply for her as well protecting her without a second thought. Aino also cared deeply for Kaguya's happiness and well being, becoming visibly happy that Tenji and Kaguya were spending more time together and sacrificing her life without hesitation to protect Kaguya's unborn children.

Kaguya likewise seemed to value Aino as what appeared to be her only friend as she protected her and was openly devastated when she was killed.

Appearance
Aino had long brown hair and wore the uniform accustom to attendants appropriate for women of her era.