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Karin Jenson
This calls for an injection, stat! Please roll up your sleeves!

Karin Jenson is a nurse at the Dye-Young Clinic, where her grandmother Bonnie Young is the director. The two are normally seen together, with Jenson acting as Young's assistant.

Unwilling accomplice


Young and Jenson.

The conductor of a black market auction got into contact with Jenson in order to coerce her into being his accomplice in the murder of Jill Crane. By threatening to reveal that her grandmother, Bonnie Young, had falsified an autopsy report for the IS-7 Incident years prior, Jenson felt she had no other option but to cooperate.

On the night of April 4, as the auction began, Jenson hid in a costume trunk in the secret evidence storage room used by the auction on the hidden 51st floor of the Grand Tower. After the conductor (who wore one of the masks with a built-in voice changer that all participants in the auction wore in order to conceal their true identities from each other, and so Jenson did not know who he was) successfully struck Crane before she was able to do so first, he had Jenson switch places with her by putting on her clothes and a wig that was similar to Jenson's own hairstyle. While the conductor was otherwise occupied, Jenson covered Crane with a red raincoat. She noticed a wavy wig nearby as she was doing so, but dismissed it due to the more important events that were taking place.

Jenson then replaced Crane in the auction. Since all auction participants wore masks with voice-changers on them, it was easy enough for her to put on the mask Crane had worn and take her place due to their similar physiques. She successfully bid on the costume trunk, which contained Crane, and then returned to the storage room with the conductor. However, by this time, Crane had managed to escape from the box and climb a ladder out of the storage room to the top of Grand Tower before succumbing to her wound. Kay Faraday, who had stumbled across the dying woman, managed to fall down the hatch Crane had used, knocking herself unconscious on the floor of the storage room. Jenson took the raincoat off Crane before the conductor could see it. Jenson and the conductor then dressed Crane's body in a replica of the conductor's clothes.

Both Faraday and Crane were locked inside the costume trunk until the end of the auction. Believing that Faraday was an accomplice of Crane's, the conductor decided to plant evidence on her to implicate her in the murder. The whole time, Jenson could not identify the conductor, as he always wore his mask. All she knew was that he had a mark on his chin.

Jenson took initial care of Faraday after she was found in an amnesiac state at the Big Tower. Despite her physical injuries being only minor, Jenson wrapped a number of bandages around her patient. Faraday's clothes were sent to a forensics lab for testing. Jenson then brought her to Miles Edgeworth's office; as Faraday had Edgeworth's business card on her person, he was the only person who the nurse could think might know her. Jenson then accompanied Young to the Prosecutorial Investigation Committee (P.I.C.)'s meeting room, where Crane's body was found and where the auction had taken place. Young relayed her autopsy report orally to Jenson, but Jenson intentionally wrote it down incorrectly. While the head wound was the cause of death and the stab wounds found on the body were post-mortem, Jenson switched the order of events so that the stab wounds were the cause of death. Grandmother and granddaughter then bought cotton candy at the viewing platform at the top of the tower before leaving.

Jenson and Young were summoned the next day to Edgeworth's P.I.C. hearing to determine his fate as a prosecutor. However, Edgeworth's deductive skills quickly allowed him to reveal Jenson's role in the forgery and murder. Edgeworth attempted to expose Blaise Debeste, the chair of the P.I.C., as the killer and auction conductor, and eventually, the mark that Jenson had seen was identified as a burn mark. Through this, it was discovered that the wavy wig Jenson had seen was actually a fake beard worn by Debeste to conceal the burn mark on his face.

Faraday regained her memories soon after Debeste's arrest. Jenson gave her back her original clothes and removed all her bandages. Jenson and Young would later be tried for their respective crimes but received lenient punishment due to the fact that they had both been blackmailed.


Karin Jenson
Better safe than sorry! A pound of prevention is worth an ounce of cure! That's my motto!


Jenson is excessive with her precautions, as summed up in her corruption of the saying, "An ounce of prevention is worth a pound of cure." She applies excessive bandages (such as with Kay Faraday, despite her injuries not being very severe), offers injections to anyone she feels is under the weather, and has a poor bedside manner. She has a strong bond with her grandmother and was willing to resort to crime in order to protect her. Although Young would occasionally hit Jenson on the head with her walking cane when irritated with her, Jenson would be just as likely to respond by slapping her grandmother's hair bun.


  • Japanese - Touko Mutou (武藤 瞳子):
    • Her full name in Japanese is a play on "budoutou" (ブドウ糖) and "mutou touko" (むとう とうこ), which are the Japanese terms for "glucose" and "grape sugar," respectively. This may be a reference to the sugar pills used as placebos in medicine.
    • "Muto" (ムトウ) is also a major manufacturer of medical supplies in Japan.
  • English (Unofficial) - Karin Jenson:


The kanji on her nurse cap is "安全第一" (anzen dai ichi), which translates into English as "safety first." It was translated as "Safety 1st!" in the unofficial English fan translation.