After the first game's development was finished, Mikami told Takumi that they should make an "Ace Attorney" trilogy, with a grand finale in the third game's last case. Takumi had originally planned to let Edgeworth be the prosecutor in all episodes in the second game, but during the production the development team learned that the character had become popular. This led to Takumi feeling that he had to use the character more carefully and sparingly; he created the new prosecutor character Franziska von Karma, to save Edgeworth for the game's last case, and avoid a situation where he—a supposed prodigy—loses every case. As Takumi wanted the three first "Ace Attorney" games to be parts of a larger work, he avoided making a lot of changes between games: art from the first game for main characters such as Phoenix, Maya and Edgeworth was reused, to avoid having the previous games look outdated in comparison to newer games in the series; and no new gameplay mechanics were added for "Trials and Tribulations", as Takumi was happy with the gameplay after having added the psyche-lock mechanic for "Justice for All".