御剣 信

Gregory Edgeworth was a very talented criminal defense attorney and his son Miles idolized him. He was the kind of defense attorney who was not afraid to stand up against corruption. He used a calm, methodical, and logical approach to his investigations, preferring to use logic and confront witnesses directly at the scene rather than use the sorts of methods that Phoenix Wright or Apollo Justice would later use. He also had a rather serious, professional demeanor at all times, only smiling when he made a mistake and got a penalty, though it was more of a nervous grin. Miles inherited much of his father's methods, though he would come off as cold and ruthless due to his relative lack of tact. 

In December 2000, Gregory took on the case of Issei Tenkai, a famous television chef. He was aided in his investigation by Tateyuki Shigaraki, a young man who idolized him. The case was would later officially become known as the "IS-7 Incident".

During his investigation into the crime, Gregory butted heads with Manfred von Karma, a legendary prosecutor with a perfect win record. As he and Shigaraki became more involved in the case, he realized that von Karma wasn't just keeping him away from the scene because he didn't want the defense gaining any sort of advance; he was actively trying to hide something. Even Tyrell Badd, the detective who was supposed to lead the investigation, was continually stymied by von Karma's authority, and he eventually decided to ally with Gregory. Eventually, Gregory was able to figure out what von Karma was hiding; the body of the victim had disappeared before an autopsy could be carried out.

During the subsequent trial, Gregory accused von Karma of hiding the disappearance of the body. However, von Karma produced a falsified autopsy report, verified by the police, and so the trial continued for a year. Eventually, Tenkai confessed to being an accomplice to the murder, but with Badd's help, Gregory revealed that the confession had been coerced. Although Gregory still lost the case, this bombshell revelation gave Manfred von Karma the only penalty on his "perfect" record, which enraged the perfection-obsessed prosecutor. The majority of the blame was shifted onto the Detective Wataru Shirase, who was subsequently fired. 

After the trial, Gregory and Miles proceeded to leave the courthouse, accompanied by Yanni Yogi, a court bailiff. Gregory hoped to get a retrial for his client. However, an earthquake struck the building and shut the power down, leaving the three stranded in an elevator for five hours. Eventually, the oxygen supply diminished, and Yogi started to panic. The two men fought, leaving Miles to try and stop them by throwing Yogi's pistol, which had been loosened from the man's belt. The gun went off, hitting von Karma, who had wandered in front of the elevator door. Just then, the elevator door opened; already outraged by his penalty and in shock from his wound, von Karma picked up the gun and, finding all three of the elevator's occupants passed out, shot Gregory. Gregory Edgeworth died, never knowing who had killed him. His spirit later spoke through a spirit medium named Misty Fey, blaming Yanni Yogi for the murder. 
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Based on his URL=http://aceattorney.wikia.com/wiki/Ace_Attorney_WikiAce Attorney Wiki page.