If I am recalling correctly, Akagi caught a guy's wait by the fact that he kept checking his tiles on the left, where the manzu would usually be in a default sorted hand. It's the only time i can recall something like that happening in a Mahjong Fukumoto work. It should really be used more...
In some aspects, Miyami resembles Akagi in her way of manipulating and analyzing her opponents' behaviour and playstyle, and betting on trusting her own judgment. It's interesting to consider the personalities of Fukumoto's characters and how they are reflected in their mahjong playstyle.
Let's not forget Akagi stepped on a half-dead guy's head; by comparison, Mamiya is positively polite. Speaking of, I wonder if mister perv would try to punch Akagi.