Raymond Shields

Tateyuki Shigaraki is a defense attorney who was Gregory Edgeworth's investigative partner when he was alive, the IS-7 Incident being a notable case in which he aided Edgeworth. He asked Miles Edgeworth if he would want to become a defense attorney like his father, causing the genius prosecutor to question his career.

IS-7 Incident and DL-6 Incident

 * Main Article: The Inherited Turnabout

In his early life, Shigaraki aided Gregory Edgeworth in the murder of a chef, Isaku Hyōdō to defend another famous chef, Issei Tenkai. They met Manfred von Karma, the prosecutor for the case and eventually proved that von Karma had a forged piece of evidence and decided to face him in court. They managed to penalize von Karma for forging evidence but von Karma managed to give a guilty verdict to Tenkai as "Accomplice to murder". After the trial, Gregory Edgeworth was murdered by von Karma inside the courtroom elevator. After that, Shigaraki took over the Edgeworth Law Offices.

A murder in prison

 * Main article: The Imprisoned Turnabout

Shigaraki had just returned from overseas. He met up with Miles Edgeworth and his partners while they were investigating Manosuke Naitō's murder. He called Edgeworth Manfred von Karma at first instead of his real name, which angered Gumshoe and Kay. He was supposed to be Naitō's defense attorney. When Edgeworth got kicked out from investigating, he asked if he could be his partner for the case, since Shigaraki took on the case of Sōta Sarushiro, the only suspect in the case. Seeing as he was determind to find the truth, Shigaraki agreed. They both investigated and exposed the prison director as the true culprit. This was the beginning of a new relationship.

IS-7 resolution

 * Main Article: The Inherited Turnabout

After the prison incident, Shigaraki told Edgeworth about IS-7. They went to the crime scene when another incident occured. Yutaka Kazami, a witness of IS-7 was poisoned. The missing body of Isaku was also found again in a fountain. Edgeworth proved that Kazami was poisoned by Tsukasa Oyashiki, Tenkai's adopted daughter for being the true IS-7 culprit and holding the innocent Tenkai in prison for 18 years. Edgeworth and Shigaraki cross-examined Kazami and proved him guilty. This put rest to the IS-7 incident.

Kagome's murder

 * Main Article: The Forgotten Turnabout

During the murder of Tsubasa Kagome, Shigaraki was one of the people who helped Edgeworth clear Kay Faraday's name, who was accused of Kagome's murder and find the real murderer, Chief Prosecutor Bansai Ichiyanagi

Teikun Ō's murder

 * Main Article: The Grand Turnabout

The President of Zheng Fa, Teikun Ō, was found crushed in a filming set owned by Global Studios. Meanwhile, Shigaraki was defending Miwa for the murder of Manosuke Naitō. Edgeworth wanted to connect Miwa with Bansai Ichiyanagi's illegal activities and actually managed to do it. Shigaraki went with Edgeworth and the others to investigate the old SS-5 Incident with Little Thief's help. Not long after, they questioned an assassin, Ryōken Hōinbō, who escaped from prison. After learning new facts, they discovered that Ō's murderer was none other than Sōta Sarushiro, who was also indirectly responsible for all events that transpired the previous weeks. The group confronted Sarushiro and exposed him as the killer.

Aftermath
During the credits, Shigaraki is talking to Detective Badd in the courtroom about the reopened IS-7 case where they will both testify.

Personality
When Shigaraki was young he was very cowardly, stuttered a lot and got easily scared. He was much more open about his feelings, especially his adoration for Gregory Edgeworth, and his disgust for inequality and misconduct. He had a tendency to write things down in his notepad. He would then proceed to rip off a page and swallow it in order to "remember" it. His personality changed greatly after the DL-6 Incident. At first, he seemed to be rude and mocking to Miles Edgeworth but this is only because of his disdain for Manfred von Karma.

Shigaraki is playful and laid back, often relying on sarcasm and jokes to handle tough customers. He's become more cool and calm. He puts bits of sarcasm at his speech. He likes to joke around, contrasting the serious nature of Edgeworth. But underneath his teasing he has a passion for truth, a sharp and clever mind, and a loyalty to his clients that any defense attorney would be proud of.

He claims that spending time overseas gave him an appreciation for hugging and he asks for one from just about every woman he meets, for whatever occasion he can think of. Marī Miwa was more than happy to give him one, even kissing him on top of it, something he didn't expect to happen. Despite this he still shows great honor and respect to Gregory, he even copied the way he bowed to people.

Name

 * His name contains the kanji for "shield" (盾, tate). This could be a refrence to his partnership with Gregory Edgeworth seeing as Gregory's Surname contains the kanji of sword.
 * His name could also reference to his job: he is a defence attorney.
 * He also shares the first kanji of his surname with the first kanji of Gregory Edgeworth's Japanese given name, shin (信), which means "truth."
 * His fanmade name, Raymond Shields, holds reference to his job. Raymond could be originated from a Germanic name Raginmund which is created using the words "advice" (ragin) and "protector" (mund). His last name, Shields is referring to his job as a defense attorney. It could also refer to his original name.

Development

 * Though he acts as an ally for much of Gyakuten Kenji 2, Shigaraki is never formally declared a partner by the game.
 * Shigaraki (especially his younger self) is the favorite new character of art director Tatsuro Iwamoto.
 * In the fanmade English patch for the game, Shigaraki's name is "Raymond Shields".