Morgan Fey is the head of a Fey clan branch family, and the mother of Pearl Fey. She is a well-spoken woman and has high expectations of people visiting Kurain Village to respect the traditions of the village. Morgan is extremely overprotective when it comes to Pearl, and she tends to view outsiders, especially Wright, with disdain.
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Morgan seemed at first glance to be a calm woman who was apologetic at times for being a "lowly" branch family member, but was revealed to be cold and bitter. Dahlia Hawthorne described her as being cold, twisted, horrible, bitter and vengeful. Morgan considered Pearl her most valued treasure, and her crimes were intended to make Pearl the next Master of Kurain. Dahlia Hawthorne, however, once suggested that Morgan cared only about Pearl's ability to become the next Master. When enraged (usually when Wright doesn't refer to Maya or Pearl by their "Mystic" title), Morgan's eyes become white and blank, a trait shared by her daughter Dahlia Hawthorne when her true nature is revealed.
Morgan Fey was married to a wealthy jeweler and gave birth to twin daughters, Iris and Dahlia. She was set to become the heir of the Kurain Channeling Technique, but her sister Misty Fey's superior channeling powers allowed Misty to usurp the position from Morgan. The village looked down on her for losing out to Misty and her family became a powerless branch family. Because of this, Morgan's husband left her and Kurain Village, taking both daughters with him. These events left Morgan a bitter and vengeful woman. Morgan married again and had a daughter, Pearl, who possessed amazing spiritual skills. However, her second marriage ended badly too, with her second husband leaving her soon after Pearl's birth.
Morgan had always been bitter that she had been reduced to a branch family. Mimi Miney met Morgan and they came up with a plan to kill Turner Grey and to frame Maya for the murder. For Morgan, this was in order for her daughter, Pearl, to take Maya's place as the Master.
About a year later, Morgan was transferred to another prison, which also happened to hold her daughter Dahlia Hawthorne, now a death-row inmate. Although initially planning to kill Hawthorne, she chose to conspire with her to murder Maya. Morgan intended for Pearl to become the next master of Kurain upon Maya's death, while Hawthorne participated in order to take revenge against Maya's late sister Mia Fey, who had gotten her convicted. The plan was for Morgan to guide Pearl towards finding some hidden instructions left for her in Kurain Village. Pearl was to bring Maya to Hazakura Temple, and once there, channel Hawthorne, who would use her body to murder Maya. Morgan considered this "my last great wish", this perhaps being the only opportunity left available to her to usurp the main family.
[Based on her Ace Attorney Wiki page.]