She figures that Shinji is plenty aware of the other person that was brought back from their friend group. Aigis was still trying to decide if she could truly bear to see Makoto go a third time.

Shinji then asks what good Maruki thought using the Shadows would do. She shrugs. "From what I understand his goal is to alleviate the suffering of humanity in ways that he sees fit. There are new Persona users and one of them was made to believe that she was her deceased sister in this reality."