Rojas left the Intelligence Unit after Season 7 due to personal reasons that were not explicitly detailed on the show.
Vanessa Rojas, played by actress Lisseth Chavez, was a character introduced in the seventh season of “Chicago P.D.” as a new member of the Intelligence Unit. Rojas was a former undercover officer with a tough background, which helped her connect with cases on a personal level. However, after the season ended, it was announced that Chavez would not be returning to the series.
The departure of Rojas was not addressed on-screen with a storyline within the show. Instead, her absence was noted without much explanation, leaving viewers to speculate about the in-universe reasons for her leaving. Behind the scenes, it was reported that Lisseth Chavez was leaving “Chicago P.D.” to join the cast of “Legends of Tomorrow,” a superhero television series based on characters from DC Comics. The transition seemed to be amicable, with the possibility of Rojas returning in a guest capacity, although as of my knowledge cutoff in 2023, such a return had not occurred.