Yuuka is a special case. Like some high-ranking Investigators like Kureo Mado, she possesses and uses multiple Quinque in battle. What makes her special is how she uses them. After a long career of throwing herself recklessly into battle against high-ranking Ghouls with little concern to her own life, Yuuka has lost a lot of things. Her arms, a segment of her jaw and a few of her teeth, the left half of her face, and everything below the waist. To compensate for this, she uses specially-made Quinque as replacement limbs. Appearing as prosthetics when not in use, she carries them literally on her person at all times instead of in a bag or suitcase, allowing her to blend in more naturally in areas where there are Ghouls. They include: -Right Arm "Migi" (Rinkaku): A tail-like appendage with many leg-like cilia that ends in a poisonous pincer like an insect. The tail's appearance most strongly resembles the spider-tailed horned viper, and it can expand and contract, giving her arm a longer range of movement (at the cost of opposable thumbs while in use). Pictured here in its inert form. -Left Arm "Hidari" (Koukaku): A giant, club-like arm that's in gross misproportion to the rest of her body. It can be used to shield her and has a powerful punch, and when cocked back it can be fired like a pile-driver in an attack with a slow windup but a devastating finisher, capable of obliterating cars and mortally wounding most Ghouls. -Lower Body "Hara" (Bikaku): Her legs have been harvested from a single Ghoul and take the form of raptor-like insectoid legs that have a powerful kick and can run and jump at incredible speeds. Her maximum jumping height is 240 meters and she can run at 370 kilometres per hour, roughly one-third of mach speed and faster than the human eye can follow. This allows her to keep up with the fastest S and SS-rank Ghouls without an Arata, pursue prey across the city and over extreme vertical obstacles, and even dodge bullets to some limited capacity, much like A and S-rank Ghouls. Pictured here in their inert form. -Face "Me" (Ukaku): A flesh-like covering that hides the left half of her face that was clawed off by a Ghoul, it is easily mistakable for a burn mark, but when it unfolds it becomes six small, featherlike wings capable of firing crystallized Rc cell bullets at high-velocity. Or in other words, a Quinque gun. Like ukaku Ghouls, it has limited stamina and thus limited ammunition, although its exhaustion affects Yuuka little. Therefore she uses it sparingly as a trump card when backed into a corner. Due to the way her prosthetics are designed (and due to the way prosthetics work in general), her nerves must directly interact with the Rc cells in her new limbs in order to control them, meaning she is directly interfacing with Ghoul flesh when using her Quinque. The more of her limbs' powers she uses, the more violent and irrational she becomes, attacking friend and foe without thinking and even losing control of her limbs. The longer and/or harder she fights, the more feral and Ghoul-like she becomes. Whether this is her limbs having an effect on her body and mind or just the result of adrenaline mixing with painkillers and antidepressants is unclear.

Gentle and matronly, with hints of a bottle fairy, Yuuka occupies a curious space between big sister and team mom. She genuinely cares for her subordinates, and doesn't seem to mind that other investigators mock and fear her. Overall she's a hard-working and kind-hearted person who likes to have fun with her subordinates, but when in battle her personality changes completely. She has developed an acute bloodlust towards Ghouls and will attack them viciously without stopping, often continuing long after they are dead. Her behavior towards Ghouls can only be called sadistic and uncaring, thinking little of human traits like civility and empathy and reverting to primal, animalistic fight or flight mechanisms. She doesn't understand what's wrong with this, as she thinks of Ghouls as bestial sub-humans who are not merely evil but monstrous in their thinking and who must be destroyed, like putting down a feral animal. To her, one species must prevail as the rules of nature dictate, so there is nothing wrong with exterminating Ghouls with extreme prejudice.

Yuuka graduated from the CCG Academy at age 20, and was immediately partnered with the man she would later marry, 1st-class Investigator Matsuoka Kenji. The two developed an extremely close bond, and soon began dating. Before long, they were married, with a child on the way. Yuuka worked hard for the sake of her husband and her newly born child, rising through the ranks quickly to become a 1st-class Investigator just like her husband. Together, they took down a record-breaking number of Ghouls, going undefeated and suffering minimal losses for three straight years. That winning streak finally came to an end during a standoff with an S-class Ghoul that crippled Kenji at the cost of its own life. Battered and broken, the victorious couple were separated after Kenji was demoted due to his injury, which prevented him from working in the field. It was this separation that ultimately proved fatal. The CCG had suspected the Ghoul they'd taken down had actually been part of a much larger gang, perhaps even an organization like Aogiri Tree, and in the end they were right. Other members of the group caught Kenji off-hours and without his Quinque, and tortured him for hours before Yuuka and the CCG managed to rescue him. By that time he was mortally wounded and close to dead, a barely recognizable lump of meat, but he still had enough life left in him to warn his grieving wife about the danger that was still to come. He'd overheard some of the Ghouls talking about searching their house. Concerned for their child's safety, Yuuka rushed home, only to be met with the gruesome sight of a Ghoul devouring her three year old son in much the same way a human would dig into a cut of veal. It was this that finally made Yuuka snap. She attacked the Ghoul, breaking all of his limbs and slowly torturing him to death until the CCG finally arrived at the house and restrained her. Since then she has become an even higher-ranking investigator, and years of throwing herself near-suicidally into fights with Ghouls has begun to show. She has lost her arms, parts of her face, and the entire lower half of her body. In an unorthodox decision, she has decided to replace each of her missing parts with Quinque collected from Ghouls she's killed, making her a truly unique Ghoul-killing machine.

Because of her limbs and the disturbing way she fights, other investigators fear and loathe her and refer to her by her Ghoul-given nickname "Cannibal Corpse" behind her back. While the CCG's best physicians assure her that mingling her flesh with that of a Ghoul in such a minimally invasive way won't result in the kind of hybridization that creates one-eyed Ghouls and that this increasingly violent behavior is all in her head, it has done little to dissuade other investigators from mocking and belittling her as a race traitor and a half-breed. Her nickname, "Cannibal Corpse", is a combination name that refers to how she obsessively cannibalizes Ghouls so she can make new Quinque, and how she should by all rights be a corpse after all the wounds she's received. Hence "Cannibal Corpse", a half-dead scavenger who's more Ghoul than human.