Dr. Iwata always makes me laugh. He is just so morally bankrupt, it's absurd. I love the fact that he always, always has a finger in his nose, and smoking through his nose is classic.
I really like the story of how he got his scars. When I first read it, I was kind of shocked, just thinking about how awful (and painful) such a thing would be. Norikuni has been an asshole since birth, apparently.
E^D