 Certain characters, such as Charlie's love interest in the series is entirely absent in the film, and other characters, such as Hikari's sister Susan, have greatly expanded roles in the film, while others that are far more relevant in the series, such as the "Mafia brothers" or Mimo the assassin, have their roles diminished to some extent in the film.A key difference of the film from the series is the presence in the latter of an additional main villain, who pulls the strings of the events of the story and to whom Hikari the japanese mobster is subordinate; he is entirely absent from the film in which Hikari is the sole main antagonist.Additionally, Jack and Charlie face two more enemies present only in the series, a pair of non-asian fighters who are even more powerful than Hikari's hitmen, after defeating them, then they face their final enemy, the previously mentioned main antagonist whom they have to kill to finally avenge William Chung and save Shanghai for good.