The man who was at first stalking Brigid and then tried to kill her was an agent named Marko. He reveals that he has been working in conjunction with Beth Li and that Brigid was under suspicion of working with the ROAMers and that he and Beth Li were to learn how deep she was involved. When he tried to pull a knife on Kane, the man didn't hesitate for a second. Kane draws his Spectre and shoots him on the spot.
In this casement Beth Li Rouch is Kane's partner but she is actually working for Thrush. She tried unsuccessfully to kill him when he discovered information that he shouldn't have learned after they capture a man named Sheenan. She tried to kill him after that, then seduces him in the hospital. Brigid left Rouch in the apartment when the bombs exploded, killing her.
Ambassador Cobalt. In this casement, Cobalt isn't a baron, but he is almost as powerful. He is an ambassador. After Kane and Grant, with Grant's forces attack the Embassy, Cobalt tries to escape in a limo. Grant takes off after him in a Deathbird. During the fight, Thrush accidentally kills the Ambassador.