I remember watching a movie on TV about a man who could "see" the "voices" in people's minds. These voices were depicted as people. I'm not sure if everyone had these voices. Maybe he could only see these voices with people with issues, but I'm not sure. This was at least 10 years ago.
In the story, a policeman asks this man to help him on a case/cases. I remember two of them interrogating a single person, and the seeing multiple personalities being interrogated. So there were like 10+ people in the room, but in reality there were only three.
He could see people with 2-3 personalities/voices, and this seemed normal to him. There was one guy with around 10 and I think he was the suspect that was being interrogated.
I feel like it was an Asian movie.