Quanxi

Quanxi (クァンシ) was a devil hunter from China.

Appearance
Quanxi is a tall woman with hair that she has tied back in a ponytail. She wears an eyepatch over her right eye.

When in combat Quanxi dons a set of sheathes on her back that can hold up to three swords.

Personality
Quanxi is a calm and stoic, having no shame at discussing business with a man while she's in bed with her harem of fiends and showing little emotion even as her girlfriends fawn over her. She does deeply care for her fiends, making her one request for a reward to be that they are given human rights and a basic education.

Quanxi is ruthlessly pragmatic in combat, preferring to throw her enemies outside of the battlefield in order to efficiently cut down their numbers and remove distractions.

International Assassins arc
In China, Quanxi is in bed with four fiends as a member of the Chinese military gives her a job to go to Japan and capture the Chainsaw Devil. He says that the general will authorize any reward for her work due to the danger of the mission. Quanxi asks her fiends what they want and they respond with donuts, blood and Halloween. Quanxi tells the man that she wants her girls to recieve human rights and a a basic education and the man tells her that they'll look into it, provided she succeeds.

In Japan, Makima discusses with Kishibe about the various threats that are coming from overseas including a rumor that Quanxi is on her way. Kishibe says that he isn't keen to fight her and that she'll be tricky but there is no use in taking precautions against her.

Quanxi arrives in Japan and visits a sushi restaurant with her fiends. She announces that she's out of energy for the day so she'll resume the mission to capture Denji tomorrow.

She ends up having sex with her fiends all night long making them exhausted the next day and after they learn that Santa Claus is also in the area they decide to put off getting involved until tomorrow again.

Quanxi and her fiends arrive through a back alley near the department store where Denji and his bodyguards are under assault by Santa Claus. She approaches a group of devil hunters who were trying to reinforce Denji's group. Quanxi makes a comment in Chinese to let her fiends know that they should clean up the mess that will be left behind. She unsheathes her sword and after crouching low launches into a sprint that takes her through the devil hunters and army of dolls, decapitating or dismembering all of them at high speed. Aki sees Quanxi's attack through his future sight and shouts a warning to Angel Devil and Nakamura. He manages to get his blade in between Quanxi and the Angel Devil, saving the Angel Devil's life but Nakamura is decapitated and both Aki and the Angel Devil are knocked unconscious.

As her blade shatters Quanxi leaps into the midst of the group and kicks Denji into the air, incapacitating him. She swiftly dodges strikes from Tamaoki and Kusakabe and kicks them both in the jaw, knocking them out. Hirofumi Yoshida summons the Octopus Devil and blocks one of Quanxi's kicks. The Octopus Devil creates a smokescreen of ink in the air letting Hirofumi get closer to Quanxi but she kicks him and steals his knife.

Before she can stab him she is interrupted by Kishibe who arrives while holding two of her fiends hostage. Quanxi sits down at a nearby table and Kishibe passes on his hostages to Denji and Power. The two of them have a conversation while Kishibe subtly communicates another message to her by writing on a piece of paper. He informs her that Makima is listening in to the conversation and the he plans to kill Makima; if Quanxi assists him then he'll tell her everything and guarantee her safety. Instead of accepting his offer Quanxi relates a story to him about a news reporter she had a crush on and later changed her mind about. As she finishes telling her story, with some advice that Kishibe should simply be a good dog for Public Safety and keep his collar on, Aldo appears and tries to shoot Denji. Kishibe kicks Denji out of the way of the gunfire and Quanxi uses it as an opportunity to punch Kishibe in the face.

Quanxi follows up with a knee to his head and stops his counterattack by catching his knife between her fingers. Kishibe attempts to kick her but she catches his leg and throws him out the window. Aldo shoots at Quanxi's fiend who is holding Denji down but before he can press the attack he is grabbed by Quanxi and thrown out of the window to land on Kobeni Higashiyama's car.

Quanxi politely asks Power to let her hostage go, claiming to not want to fight her. Beam appears out of the ground and knocks the fiend off of Denji, allowing them both to run away. Before Quanxi can follow them, Hirofumi stands back up and demands a rematch. They exchange blows with Quanxi initially having the upper hand but Hirofumi is able to land a powerful kick on her face, damaging her.

After fighting some more Quanxi picks up Hirofumi and throws him out of a window, though he saves himself from falling to the ground by using the Octopus Devil. She looks back at Aki, the Angel Devil, Tamaoki and Kusakabe who have all picked themselves up and ask if they want to fight next. Suddenly everything goes dark an enormous hand reaches down the from the sky, transporting everyone inside the mall to Hell.

Abilities
Quanxi is an extremely powerful fighter, with Kishibe declaring that if the entirety of humanity came together in a bare-knuckle fighting tournament, Quanxi would take first place.

Physical Abilities
Immense Strength: Quanxi possesses a level of strength that has been described by Hirofumi Yoshida as being beyond what a human is capable of. Wielding swords she could cut through dozens of humans and dolls without slowing down and only stopped once her weapons were destroyed by the force of her own attacks. Even a blocked strike from her was enough to knock out both Aki Hayakawa and the Angel Devil.

Immense Speed: Quanxi possesses a ridiculously superhuman level of speed. She could disappear from the sights of five devil hunters by blitzing past them and cut through an army of dolls created by the Doll Devil, dismembering or decapitating dozens of them before the original five devil hunters realized they had already been killed. Only Aki Hayakawa who could percieve the future through the powers of the Future Devil was able to react to her high-speed attack and block it at the last moment.

Skillset
Hand-to-Hand Combat: Quanxi is a skill fighter in hand-to-hand combat, with Kishibe considering her to be one of the best in the world. She is highly specialized in using kicks as within a matter of moments she could disable Denji, Tamaoki and Kusakabe using nothing but kicks and prevent Hirofumi from attacking her with a knife through a smokescreen by delivering an accurate kick to his jaw.

Swordswomanship: Quanxi wields multiple blades in combat, swapping them out as they're destroyed by the force of her own attacks. Combined with her high speed she can cut through entire crowds of enemies at high speed but her skill with facing other armed opponents is unknown.