Dahlia Hawthorne / Chinami Miyanagi - A beautiful, sweet, and charming young lady. She can easily capture the heart of any man with her angelic smile. Besides Phoenix Wright and Mia Fey, Dahlia also plays a severely important role in the game.
Doug Swallow / Kikuzou Nonda - Victim of Case 1. Was Dahlia's boyfriend until he realized there was something devious about her...
Taking place 5 years before the current events in the game (roughly three years before Phoenix Wright: Ace Attorney), the player takes on the role of Mia Fey in her second case as defense attorney in court, assisted by Marvin Grossberg, against the "Rookie Killer" Winston Payne. She must defend a younger Phoenix Wright, who is still a university student studying arts and accused of electrocuting pharmacy student Doug Swallow after they were witnessed to have a heated discussion where Swallow spoke ill of Dahlia Hawthorne, whom Wright was dating. It turns out that the case is tied to Mia's first defense case about eight months prior, one that she could not win, through the presence of Hawthorne. Hawthorne, then, had used Swallow to obtain a rare poison, and employing a locket with a small bottle, used it to poison an attorney during questioning. Knowing that she would be accused if she were caught with the locket, she feigned romantic attachment to Wright, who happened to be in the court building at the same time, and presented him with the locket as a gift of their love. Since then, she had to keep up her romantic act towards Wright, trying someway to get the locket back lest it come back to identifier her in the poisoning. In the present, realizing that Wright had a cold, she again stole some poison from the pharmacy lab, and put it in Wright's cold medicine, hoping to murder him to get the locket back. However, when Wright accidentally pushed Swallow down, dislodging a power cable, Hawthorne saw her chance to murder Swallow, pin it on Wright and get rid of the poisoned cold medicine. Fey sees through her lies and Wright is found not guilty. Wright is awed by Fey's job, and dedicates himself to becoming a lawyer.
The Stolen Turnabout
The next case begins with the theft of a rare gem by Mask☆DeMasque. Some days later, the Kurain Village Display Exhibition begins. However, the Kurain Urn is stolen, unknowingly again by Mask☆DeMasque, making Maya and Pearl victims of the theft. Wright and Co. Law Offices, then meet Luke Atmey, a detective investigating Mask☆DeMasque. The defendant is a man named Ron DeLite, who claims to be Mask☆DeMasque. However, as the first day of the trial with the coffee maniac prosecutor Godot comes to an end, the body of the head of KB security (the firm that employs Larry, Oldbag and Ron), Kane Bullard is found hidden in his safe. This time, Ron is accused of murdering Bullard. After more investigation, it was revealed that Bullard discovered Luke Atmey was the controller of Ron's actions as Mask☆DeMasque. In order to prevent his secret from being revealed, Atmey killed Bullard.
Recipe for Turnabout
Phoenix Wright discovers, via a newspaper article, that he apparently lost a case the previous month; however, he has no recollection of the case, and it appears that an impostor had posed as him at the trial. It turns out that the defendant is Maggey Byrde (who he had previously represented in Justice For All and is now working as a waitress at a local French restaurant, "Tres Bien") and she has been convicted of the murder of a local computer programmer, Glen Elg. Due to the incompetence of the defense attorney at the original trial, a retrial is called, and Phoenix is intent on clearing both the client's name and his own.
During the course of the investigation and trial, it transpires that the victim, Glen Elg, was in debt to a local loan shark, Furio Tigre, to the tune of $100,000. Glen had intended to repay his debt by handing over to Tigre a valuable computer virus, "MC Bomber", which could have sold for several million dollars on the black market. However, during his meeting with Tigre at Tres Bien, when he had planned to hand over the disc containging the virus, he discovers that he has won $500,000 on the lottery - more than enough to repay Tigre's loan.
Tigre had made the loan to Glen, who had a history of gambling problems, knowing full well that he would be highly unlikely to be capable of repaying the loan. Glen's eleventh hour lottery win threatened to ruin Tigre's true plan, which was to gain ownership of the MC Bomber virus. Tigre then intended to use the proceeds from its sale to pay off the notorious mobster, Bruto Cadaverini, whose granddaughter Violetta he had injured in a road traffic accident. He therefore murdered Glen by spiking his coffee with potassium cyanide and, with the help of the restaurant's owner, Jean Armstrong (who himself was also in debt to Tigre), planned to cover up Glen's murder and frame Maggey in his place. To guarantee the success of his plan, Tigre impersonated Phoenix (badly) and staged a pitiful defense to ensure Maggey would be convicted.
During the retrial, Phoenix discovers the reasons and manner in which Tigre accomplished his plan, and successfully implicates him, clearing Maggey in the process.
This case is a flashback to Mia Fey's first case as a defense attorney, with her colleague Diego Armando as co-counsel, during which she faces off against a young Miles Edgeworth. The defendant, Terry Fawles, is an escaped death row convict who stands accused of the murder of police officer Valerie Hawthorne.
Terry had been in prison for the kidnap and murder five years earlier of Valerie's sister, Dahlia Hawthorne. Terry had taken Dahlia to the bridge at Eagle River, where Valerie was supposed to hand over the ransom which Terry had demanded; however, Valerie had shot Terry in the arm, and Terry had thrown Dahlia into the river beneath them. Valerie was both the person who had captured Terry, and the main witness for the prosecution at the original trial, and on his escape Terry had contacted her to arrange a meeting at Eagle River, where he had killed Dahlia. The sole witness to the recent events at Eagle River is a local student, Melissa Foster, who had been taking photographs of wild flowers in the hills nearby.
During the trial, it transpires that Melissa is, in fact, Dahlia Hawthorne, who it was incorrectly assumed had died five years earlier. It becomes clear that not only was the original kidnap staged by Valerie and Dahlia, with the intention of obtaining a rough diamond worth $2 million from their father (a jeweler), but Dahlia is behind the more recent events as well. In an attempt to silence Valerie, who was about to reveal the true events of five years earlier, Dahlia first kills Valerie, then poses as her when Terry shows up to meet her and attempts to frame him for Valerie's murder.
Mia is on the verge of proving Terry's innocence, and Dahlia's guilt, when Terry commits suicide on the witness stand by swallowing a small glass bottle of poison, refusing to betray his beloved Dahlia.
Bridge to the Turnabout
Phoenix, Maya and Pearl head to the Hazakura Temple, where Maya plans to undergo spiritual training, but while they are there a fellow guest, children's author Elise Deauxnim, is murdered and the prime suspect is one of the temple's nuns, Iris. During the night of the murder, a terrible thunderstorm damages the bridge between the main temple compound and the "inner temple" where Maya is training. As he tries to cross the damaged bridge, Phoenix slips and falls into the Eagle River below.
Hospitalised with a severe fever, Phoenix hands his attorney's badge over to Miles Edgeworth, who has returned to the country at Larry Butz's request and temporarily takes over the case for the defense. Not wishing for his normal role as a prosecutor to be discovered and used to undermine his case, Edgeworth arranges for Franziska Von Karma to take on the case for the prosecution, and for the usual Judge's brother to preside over the case. On his recovery, Phoenix takes up the reins again from Edgeworth, while Franziska hands over to Godot, and the Judge's brother (who has apparently contracted Phoenix's fever) is replaced once again by the Judge.
During the course of the trial and investigation, it becomes apparent that the defendant, Iris, was in two places at once at the time of the apparent murder. It is discovered that she has an identical twin sister, who is none other than Dahlia Hawthorne - who has recently been executed for the muder of Doug Swallow (as seen in Case 1). Not only that, but they are the daughters of Morgan Fey, and the elder sisters of Pearl Fey. The plot thickens even further when it is revealed that the victim, Elise Deauxnim, is actually Misty Fey - the current master of the Kurain Spirit Channeling Technique and mother of Mia and Maya, who has been missing for the past 17 years.
Phoenix gets to the bottom of the situation, and finds that the entire plot has been planned by Morgan Fey in an attempt to eliminate the current master and her family, and to establish her own daughter, Pearl, as the master of the Kurain technique. To this end, she instructed Pearl to summon the spirit of Dahlia, who was supposed to murder Maya and implicate Iris. However, their plan is ruined when Godot finds out about it, after taking advantage his role as a prosecutor to eavesdrop on Morgan's meeting with Pearl at the detention centre. He informs Misty of the plan, and they make their move to protect Maya. Misty summons the spirit of Dahlia before Pearl gets the chance to, but Godot is forced to kill Misty when, under Dahlia's control, she goes to kill Maya. During the trial, Godot is revealed to be Mia's former colleague and lover, Diego Armando, who has sworn to protect Maya and to get revenge against Phoenix, who he considers to have let Mia down.