Currently, in the game, there isn't a way for the player to follow around a particular NPC.
A player can wish to follow their character closely by left-clicking on the character's portrait, and then the camera will follow closely.
I would like to have the same thing applied to NPCs, by left-clicking on the NPC's portrait. This is sorely needed when we wanted to observe what the NPC is doing at this point in time, or where the NPC is located by panning the camera and jumping to them and their locations.