Persona 2:
Batsu

Different combinations of characters will contact demons in different ways. Often, the order in which characters are selected affects what type of dialogue you will see: Tatsuya + Baofu is a different conversation with different effects than Baofu + Tatsuya. Normally, the first character selected determines what contact type you will see, while the second and third characters modify it to a greater or lesser degree.

If the name of a contact is changed by the addition of another character, then its effects will also be changed. In both Katsuya + Maya + Baofu and in Maya + Baofu, Baofu just adds a cynical comment from the background. However, in the first case the name of the contact is changed from "Persuade" to "Persuade??" showing that it will affect the demon differently, while the second case keeps the name "Interview" showing that the contact works exactly the same as if Baofu had not participated.

Characters grow closer together as the game progresses, and characters who do not combine well in the early stages may have a lot more to say to each other later on. It's a good idea to continue experimenting throughout the game with different combinations. Relationships change, and the contact system changes with them.