John Marsh

"Penny Nichols"

- He's a pretty famous prosecutor, you know.

"Shimon Aizawa"

- But he's not wearing a prosecutor's badge.

"Miles Edgeworth"

- Gah! (He's frightfully perceptive...)

Shimon Aizawa is a 13-year-old actor working at Global Studios. He notably had a starring role in the 2019 movie The Great Monster Borumosu vs Gourdy. He was one of the suspects of the murder of the president of Zheng Fa.

Early life
The secret son of Zheng Fa's President Teikun Ō and diplomat Ami Aizawa, Shimon Aizawa's early life was marred by tragedy. By the time he was born, Ami had left her job at the American embassy in Zheng Fa. She invited Ō to meet his son at her new place of work, the Happy Family Home, but Ami could not make it to the meeting. After that, Shimon's father never came to see him. Ami passed away in 2014, leaving her cousin Hakari Mikagami to adopt Shimon. Mikagami raised him as if he were her own and became very protective of the young boy and proud of his achievements.

Borumosu vs Gourdy

 * Main article: The Grand Turnabout

In 2019, Shimon landed the starring role in the new Global Studios Borumosu movie The Great Monster Borumosu vs Gourdy. Working alongside him on the film was veteran actor Will Powers, who played the monster Borumosu. Shimon played as a boy who could telepathically communicate with the monster by drinking fresh milk. Penny Nichols was also working on set as a stagehand, as well as being told to look after Shimon. The film producers set up a filming lot in the vacant space in front of the Big Tower, where the Happy Family Home orphanage once stood. Around this time, Shimon took the time to visit the 12 Constellations Art Gallery to view the works of Paul Holic.

Accident
One night, Aizawa sneaked out of his hotel room to practice his lines at the lot. He noticed what looked like monster's footprints at the lot, and assumed that they were part of the set. He turned on a heater on the studio roof and forgot to turn it off as he went back down to practice. Consequently, a flammable can near the heater caught fire, causing a Borumosu head prop to fall. Shimon eventually noticed the fire and rushed back up to deal with it.

He came back down and started recording his practice session. During the recording, Hakari Mikagami called to check up on him, and he lied that he was still in his room. He then noticed the body of President Teikun Ō. He had been crushed to death, and there was a crushed bouquet of lion lilies on his chest. Aizawa took the flowers, fearing that their presence would implicate his mother. He also feared that the head prop had dropped onto the president to kill him.

Abduction
The next day, Nichols found the body and ran to get help, returning with Miles Edgeworth and Kay Faraday to find Shi-Long Lang already at the scene of the crime. Shimon later arrived at the scene and met everyone before slipping out again. He went to the nearby studio trailer, where Powers briefly saw him, to drop off his practice video. He then went to the Big Tower's garbage disposal site, where he was spotted by Dick Gumshoe, to dispose of the flowers. It was here that Sōta Sarushiro drugged him and placed him inside a box so that the garbage pickup would unwittingly take Aizawa to the landfill near the Sunshine Coliseum. Sarushiro later retrieved the box and hid Aizawa in a refrigerated warehouse nearby.

Sarushiro had intended to threaten Mikagami into getting Marī Miwa a guilty verdict, but Bansai Ichiyanagi got to her first, claiming to have kidnapped her son when he had accidentally kidnapped his own son Yumihiko. Luckily, Edgeworth was able to figure out where the boy was being held, and sent Faraday and Detective Dick Gumshoe to save him. After Shimon was rescued and allowed to talk to his adoptive mother via cellphone, Mikagami was able to give Miwa and Ichiyanagi the guilty verdicts they deserved. However, Shi-Long Lang called both of them back to the scene of President Ō's death, as they were his prime suspects.

The truth
Aizawa kept trying to hide his actions on the night before the body's discovery by Nichols, but they were eventually drawn out, one by one. It was also revealed that Bansai had dug up the "footprints" to retrieve something from the SS-5 Incident, the president's kidnapping. The subsequent reinvestigation of the incident revealed the recorded message from Ami arranging for a secret meeting between the president and his son. Moreover, the president's will revealed his intention to acknowledge Shimon Aizawa as his son. This shocking revelation was accompanied by another: the president had been assassinated, not kidnapped, by Ryōken Hōinbō, and had been replaced by a body double, the man whose body had just been sent to the morgue.

With Hōinbō's timely assistance, Edgeworth figured out the identity of the mastermind behind Aizawa's kidnapping and the body double's death. Sarushiro revealed his plot to get revenge on the people who had hurt him, and tried to pin the murder on Aizawa. However, his efforts failed. Hōinbō then saved Sarushiro from another assassin.

Just as he was leaving, Shimon called him out. Hōinbō offered Aizawa a knife and gave him the opportunity to exact his revenge. However, Aizawa refused to kill the assassin, having seen from Sarushiro's example that revenge only benefited the one taking the revenge, and that he would only cause himself satisfaction and cause his mother and friends more pain and suffering.

Later, he conversed with his mother on his role as the main star. He was very humble in his speech, remarking it to not be a "big deal", even though he was a main character. Shimon later purchased 3 Lion Lilies, one for his birth parents, and one for his adopted mother.

Personality
Shimon gives off a very bratty and arrogant vibe. His perceptiveness gives him a strong advantage against any adult who claims to have authority or tries to intimidate him, even causing Shi-Long Lang to back off. However, his bravado is instantly vaporized in front of his adoptive mother Hakari Mikagami, as well as when he is cornered by Miles Edgeworth and his logical faculties. This reveals a caring boy who would do anything to protect his mother. He also swore revenge against the man who had killed the father he had never met, but decided against an opportunity to make it happen after realizing the real consequences of revenge.

Aizawa is often mistaken for an elementary school student due to his fondness for milk, short stature, and youthful appearance, much to his chagrin. He seems to have an interest in confectionery-based art, as seen by how he visited the 12 Constellations Art Gallery to see Paul Holic's work.

Name

 * "Shimon" can mean "fingerprints", "inquiry/examination", or "tutelage", depending on the kanji used. The former two meanings may be a reference to how his blood ties to the real Teikun Ō went on to prove that the murdered Zheng Fa president was only a body double. The latter meaning could be a reference to being under Mikagami's guardianship.


 * His English name in the fan translation of Gyakuten Kenji 2 is "John Marsh".

Development
Shimon's design is strongly based on the cow motif, due to his role in the movie. He wears horns in his hair, has a cow-like cell phone, and has the aforementioned fondness for milk.