Miles Edgeworth endured significant childhood trauma from the DL-6 Incident. At nine years old, he became trapped in an elevator during an earthquake with his defense attorney father, Gregory Edgeworth, and bailiff Yanni Yogi. A gun discharged, killing Gregory. Miles falsely believed he caused the fatal shot, instilling lasting fears of earthquakes and elevators. A subsequent trial acquitted Yogi after he feigned insanity, leading Miles to develop contempt for defense attorneys and spirit mediums, notably Misty Fey, who channeled Gregory. After his father's death, Manfred von Karma took Miles under his tutelage, training him to become a ruthless prosecutor alongside von Karma's daughter, Franziska; Miles developed a sibling-like bond with her. His early legal career featured aggressive tactics and a pursuit of perfect conviction rates. Joining the District Prosecutor's Office at age 20, his first major investigation involved the murders of prosecutor Byrne Faraday and defendant Mack Rell. During this investigation, he first met detective Dick Gumshoe, who was deeply impressed by Edgeworth's logical prowess and pledged loyalty. Edgeworth's courtroom debut pitted him against rookie defense attorney Mia Fey in the trial of Terry Fawles. He employed ethically questionable methods, including withholding crucial witness information and making derogatory remarks toward Fey. The trial ended tragically when Fawles committed suicide on the stand, an event Edgeworth later described as his worst courtroom nightmare. Over subsequent years, he gained notoriety as the "Demon Prosecutor" due to rumors of fabricated evidence and underhanded tactics, maintaining a perfect win record until facing his childhood friend, Phoenix Wright. His professional philosophy transformed profoundly after consecutive courtroom losses to Phoenix Wright. Their initial confrontation occurred during Maya Fey's murder trial, where Wright exposed the true killer, ending Edgeworth's perfect record. A subsequent case involving actor Will Powers further eroded Edgeworth's confidence; he ultimately cooperated with Wright to reveal the real culprit, Dee Vasquez. These experiences triggered intense introspection about his prosecutorial conduct. His personal history resurfaced when he was accused of murdering Robert Hammond, his father's former defense attorney. Wright defended him, uncovering that Manfred von Karma had orchestrated Gregory Edgeworth's death as revenge for a penalty. This revelation, combined with the trauma of being prosecuted by von Karma, led Edgeworth to re-evaluate his life's purpose. He temporarily abandoned prosecution, traveling internationally to redefine his approach to justice. Upon returning, Edgeworth adopted a new principle: seeking truth above convictions. He assisted Wright in exposing culprits like Matt Engarde, demonstrating his commitment to ethical prosecution. This evolution continued in the *Investigations* series, where he tackled interconnected cases involving an international smuggling ring. Partnering with self-proclaimed "Great Thief" Kay Faraday, he utilized her "Little Thief" holographic crime scene reconstruction device. He also collaborated with Interpol agent Shi-Long Lang and reconciled professionally with Franziska von Karma. These cases deepened his investigative methodology, emphasizing logical deduction and evidence-based connections to resolve contradictions at crime scenes. His approach often involved combining disparate observations into coherent conclusions, referred to as "Logic". By the time of the "Apollo Justice" trilogy, Edgeworth had risen to Chief Prosecutor. In this role, he focused on reforming the legal system to combat corruption during its "Dark Age of the Law." He prosecuted high-profile cases like the UR-1 incident involving defense attorney Athena Cykes and oversaw international collaborations, including efforts within the Kingdom of Khura'in. While his courtroom appearances became less frequent, he remained a strategic advisor to Wright and his agency, intervening in cases requiring systemic authority or specialized investigative resources. His interactions with newer defense attorneys like Apollo Justice reflected his enduring dedication to uncovering objective truth, regardless of legal roles. Personality-wise, Edgeworth presents as aloof, intellectually rigorous, and socially reserved—traits stemming from von Karma's upbringing. He dislikes public attention and often deflects praise. Beneath his austere exterior, he harbors deep loyalty toward colleagues like Gumshoe and Kay Faraday, though he struggles to express this openly. He possesses unexpected quirks, such as a secret passion for the *Steel Samurai* television series. Professionally, he is meticulous, relying on evidence and deduction over intuition. His communication can be blunt, occasionally leading to unintended rudeness, though he shows growing willingness to acknowledge others' contributions. Relationships with key figures like Phoenix Wright evolved from bitter rivalry to mutual respect and unspoken camaraderie, grounded in their shared commitment to justice.