Yaeka Sakamori

"You desire something from me? Ah, my, it's been a while since I've had someone talk to me so openly. Did you know? When people think of my status as Queen, they shiver and run away. To be frank, it used to sadden me so much. I felt like I was objectified; an untouchable idol of power. But now I realize, all I am, is a few steps ahead of everyone in the world. Ah! I do apologize. Do continue, Sir Tengu Kite?"

- Yaeka first meeting Tengu Kite

Yaeka Sakamori (酒森 八重花, Sakamori Yaeka) is a resident of Kirigakure. However, she is no simple resident. In simplistic terms, Yaeka can be considered a Queen; an Empress who has climbed to the absolute peak of Kirigakure's hierarchical society. Indeed, Yaeka has earned her alias of the Empress of Darkness (闇の女帝, Yami no Jotei). Specifically, she attained this position through her charms and intelligence; by overthrowing the previous ruler of Kirigakure's chain of illegal organizations: Tenchikaimei (天地晦冥, Heaven and Earth Covered in Darkness). Ever since then, she has gained one of the highest positions of authority within Kirigakure; by ruling the underground, she gains access to secrets only the and the  would be privy to; she handles them well.

Furthermore, since the rise of the so-called, Blood Bound Apostle (血繋使徒, Ketsushito), Yaeka's position has been at threat; along with the entirety of Kirigakure. To this extent, she has willingly formed an alliance with the likes of Tengu Kite and other opposition to create a small faction known as the Hikōsui (肥厚水, Thickening Water) as a means to fight against this looming threat. Her role in this organization has provided her with the name, Black Queen (黒后, Kurakō), further enhancing her already powerful position.