Depending on how you *act* (not how many people you kill or how much yen you earn) you get different rankings as a samurai. These rank from "Heretic" which means you were pretty slimy, up to the Samurai King, when you only draw your sword when absolutely necessary and choose a path that saves the most people.

Depending on what rating you earn through your actions, you are awarded a certain number of points. Those points total up over time to earn you new outfits, faces, PvP characters, etc.