Under the Story option on the main menu is the ‘Character Story' tab hit that to find a story for each of the game's characters, including any added after-the-fact as Downloadable Content.
Character stories are extremely lucrative in the Fight Money stakes each story only consists of a couple of fights, but each is worth 10,000 Fight Money upon first completion. a significant chunk for the amount of effort it requires. Each will also net you some Character Experience.
