Marie was introduced in Season 6, and fans were quick to pick up that she was not to be messed with. Over the course of Season 7, Marie becomes obsessed with taking revenge on Ruby for her involvement in Danny’s death. 

After Kaz’s death, Marie weasels her way into becoming Top Dog but soon her fellow-inmates start to distrust her. Marie also manages to seduce Will (Robbie Magasiva) in order to get access to the guard offices, and is blackmailing the prison’s regional manager, Derek Channing (Martin Sacks).

In the action-packed finale, Marie tries to escape under the guise of being transported to a hearing. However, her plan goes very wrong and she ends up with a group of women being taken hostage. In the end, Marie has a window to escape and almost does, but then at the last second she goes back to kill Ruby, but is unsuccessful and is shot by Allie instead. 

After the siege is over, Marie goes into protection for good.