In the Phantom Troupe, they have Feitan, who's the torturer to get answers out of people. But they also have Pakunoda, who can get memories out of people by just touching them.
For example in the York New arc, Feitan tortures someone to get information on where the treasure and stuff were. But why couldn't Pakunoda just get that information out by searching through his memories? It would be a lot faster.