wakura aoba

Aoba Wakura (和わ倉くら 青あお羽ば, Wakura Aoba) is the older sister of Yuuki Wakura who'd taught him about being a proper young man, but later went missing at least six-years prior in a Mato Disaster. After eating a peach in Mato, Aoba ended up transforming into a Humanoid Shuuki, then became the leader of the Hidden Village, which houses other Humanoid Shuuki.

A demon that looks like a girl. Compared to ordinary demons, she has much greater power and can lead them and understand human speech. The leader of the Hidden Village, where there are people like her, called Shuuk humanoids. Endowed with several abilities, the main one being hair manipulation. Aoba can repeatedly lengthen and strengthen them for defense or attack.

Yuki Wakura's older sister. During the Mato disaster, she ate a "peach" and disappeared. This caused special mutations, gradually turning her into a humanoid shuuki. Subsequently, thanks to her leadership qualities, she became the head of the Hidden Village. Unlike other girls, she can eat an extra peach, gaining new abilities.

As a human, she lovingly cared for her younger brother and taught him everything a man should know. She often remembers that time fondly and admires Yuuki as the ideal guy.

https://mato-seihei-no-slave.fandom.com/wiki/Aoba_Wakura
https://myanimelist.net/character/190010/Aoba_Wakura