Quote Originally Posted by Amphimir Míriel View Post
The key word here is "himself", and the fact that he is a genius clouds the fact that his nature is to be outside society and it's rules. He believes that rules and morals don't apply to him, and uses his knowledge of other people's rules and morals to his advantage, without them ever constraining his actions at the least.
Of course, one could argue that society's "laws" have little bearing on the Lawful/Chaotic alignment axis. Being lawful does not require you or your actions to be dictated by one society's rules. But, as you said, alignment is too simple to spell out all possible varieties of character traits. Alignment is, however, whatever you make of it. Suffice it to say that Lawful according to the bare minimum definition of the players handbook (and I will assume this is the context of the original argument) means generally keeping one's word, having a sense of tradition, and being reliable. Lecter exibits both of these traits. Evil, by the same book, means selfishness, disregard for human life, and a willingness to harm others. And btw, to say that Lecter believes himself to be above other people's classifications and rules plays into the arrogance that Lecter uses against such people.
No matter what she thinks, the only reason Lecter did not try to kill Clarisse is because he feels attracted to her, not out of any moral or ethical consideration.
This is subject to opinion, I think. It is more complicated than you have just spelled out, surely.