I thought this was interesting because it’s almost like he doesn’t belong.
Will would always stand off to the side or away from the bodies being looked at because it was progressively getting “harder and harder” for him to look at these murders.
But Hannibal is very interested in the way other killers work; how they take the life of another. He’s interested so much in the wasted meat of these people. He’s getting too close, theoretically and literally. Soon they’ll see him and his curiosity. Curiosity did kill the cat after all.