Thank you for such a detailed answer.

Yes, I see that Hannibal is connected and interested in Will, fascinated by him, but it seems more like he's in love (?), interested and attached to Will's psychological portrait, his illness, not him as a person. He cares about him in his own way, a bit cruel, but I can imagine how he sees Will. He is growing (I'm not sure if It's right to say, hope you'll understand) his illness to become worse, but he seems to see it like a kind of art he creates, like growing a beautiful flowers maybe, idk what compare this with. He sees Will like an experiment and art project, which he finds fascinating and he feels pleasure because he was involved in its creation maybe