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This Article Contains Spoilers - WARNING: This article contains major spoilers. If you do not wish to know vital information on plot / character elements in a story, you may not wish to read beyond this warning: We hold no responsibility for any negative effects these facts may have on your enjoyment of said media should you continue. That is all.

Asa Shinn, better known as Jezaille Brett, is an antagonist in  The Great Ace Attorney: Adventures. More specifically, she is a main antagonist in the first case, "The Adventure of the Great Departure," and a supporting antagonist of the Great Ace Attorney Chronicles game series. She was a British assassin posing as a university exchange student in Japan.



She was likely born in 1875, unless she also feigned her age as part of her disguise. Asa Shinn was hired by London's Chief Justice, Mael Stronghart. He hired her to kill all those acquitted in trials where Barok van Zieks served as prosecutor in order to make it seem like he was cursed. She regularly met with Inspector Tobias Gregson on Fresno Street to discuss the best way to eliminate a potential target.

After some time, Stronghart sent her to Japan to eliminate Dr. John H. Wilson to stop him talking about Klint van Zieks' autopsy report regarding the Professor serial killings of 1890. In Japan, she adopted the alias of Jezaille Brett, a British medical student at Imperial Yumei University. She worked with Dr. Yujin Mikotoba and studied a rare posion, curare, which was only known in Europe and the Americas outside their department.

Assassination of John H. Wilson

Brett attempted to eliminate Wilson by meeting with him at a Western restaurant in Tokyo named La Carneval. As the professor had just undergone dental surgery, she knew he would be vulnerable to curare, and thus poured the poison into his drink, knowing that the Japanese police could not identify it. However, before she could leave, their table was approached by Ryunosuke Naruhodo, who wished to greet Dr. Wilson. This made it impossible for Brett to leave before the professor died, and she was still present when he began to succumb to the side effects. Using her backup plan, she framed Naruhodo by dropping Wilson's handgun on the floor so that the student would pick it up, while she shot Wilson with her own handgun that she concealed in her skirt. As the waiter, actually Inspector Hosonaga, went to deal with Naruhodo, Brett turned Wilson's table away from his seat and fled the crime scene.

Trial of Ryunosuke Naruhodo

Naruhodo was arrested for Wilson's murder, and had to represent himself in court so not to jeopardize the legal career of his friend, Kazuma Asogi, who originally wanted to represent him. She was called as a witness after Naruhodo was able to prove that another diner had been present, and Inspector Hosonaga summoned her to the trial.

Initially, Brett feigned ignorance of the Japanese language, and used Hosonaga as her interpreter. When Naruhodo suggested that Wilson may have died of poison, Brett drank the glass of carbonated water from the crime scene to "prove" that she could not have poisoned it. When Naruhodo pointed out the unique properties of curare that meant that it would only work on an active wound, Brett smashed the bottle on the floor of the courtroom.

However, the defense proved Brett's culpability by proving that the plate that would have been hers had a bloodstain present, which had been swapped with those of other diners. Brett admitted that she had killed Wilson, but did not reveal her motive.

Due to her ties to the British judiciary, she was unable to be tried in Japan, as it was requested that she be tried in a British consular court, the nearest of which was in Shanghai.

Detainment and death

It took several months for Brett to be extradited, and she was able to request certain privileges from the Japanese government, such as being able to continue her "medical research," and visit the beach on the last day before she was due to board the ship to China.

While in a beach hut, she was approached by journalist Raiten Menimemo, who demanded to know why she had killed Wilson. However, Brett simply laughed him off, although Menimemo took this opportunity to administer a rare poison from the university to Brett.

Moments later, Brett was approached by medical student Rei Membami, who accused her of stealing poison from the university. At that moment, Brett was stabbed by Menimemo through the back of the beach hut, as he realized that his original murder attempt may have implicated himself as the killer. Brett died from the attack.

Rei Membami was arrested for killing Brett, although Susato Mikotoba proved that Menimemo was the real killer. Months later, Susato and Naruhodo would discover Brett's true reason for killing Wilson after they returned to London.


  • Her pseudonym references the Jezail gun which wounded Dr. Watson in the Sherlock Holmes novels, while "Brett" in Japanese has a nearly identical pronunciation to 'bullet'. Her real name is a pun on her actual occupation, "assassin."


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