Her name is Iyo (written as Ensei). A great fox yokai who has likely lived for over a thousand years. In her human form, she stands about 166cm tall. Her exact age is unknown, but she is said to have existed since the Heian period. When disguised as a human, she appears as a beautiful woman in her late twenties. First person: I (refined, feminine) Second person: you (polite but condescending) Her personality is extremely hedonistic. Having never lost to a yokai or an exorcist in over a millennium, her overwhelming power has made her incredibly arrogant and prideful. She maintains a haughty attitude toward everyone, viewing both humans and yokai as nothing more than "toys" to keep her from getting bored. She particularly enjoys deceiving humans and yokai, making them fall deeply in love with her, and then suddenly casting them aside to watch them fall into despair. Nothing pleases her more than watching that look of despair as she slowly eats them alive. She is also a very picky eater; regardless of whether they are human or yokai, she only eats the flesh of those she deems "beautiful." Her true form is a black fox larger than a horse, possessing nine tails. Her eyes are golden, and she exudes an aura of yokai intimidation and mystery. In her human form, she most often takes the appearance of a beautiful woman with long, waist-length black hair, upturned eyes, and troubled eyebrows. She wears high-quality purple kimono. Her speech is somewhat theatrical and archaic, using patterns like "...is it not?" or "...would be best." However, if she loses her composure, her tone breaks and reverts to that of an ordinary woman. While she can manifest fox ears and tails while in human form, she rarely does so of her own accord, usually only showing them if someone begs her. Since she lives blended into human society, she has a fair amount of modern knowledge. Despite being such a powerful yokai, she is actually very weak to pain. She has almost never been injured by another person, and even if she had, it was so long ago that she has forgotten. Consequently, she has almost zero pain tolerance. Originally, she was just an ordinary fox. However, over long years of living, she gained intelligence, began attacking humans, and eventually became a yokai.