One thing I really appreciate about Will is that his anger motivates him. When he figures out that Hannibal is a serial killer who framed him and institutionalized him, he is overcome with fury and a desire for retribution. He is not afraid of Hannibal, or perhaps, his ire is so powerful that it’s inconsequential. I imagine anybody who’s as emotionally intelligent as Will would be scared in his position, but Will isn’t. He’s just thinking “That piece of shit!!!!!!!”