Fernand Mondego is the main antagonist in Alexandre Dumas' novel, The Count of Monte Cristo. He is Edmond Dante's rival for the affections of a woman named Mercedes. Not only that, but he also becomes one of the people who is responsible for Dantes' imprisonment, leading to the events of him returning as the Count of Monte Cristo.
In the 2002 film, Fernand Mondego is again the main antagonist. He is portrayed by Guy Pearce.
Mondego was once a friend of Dantes before he betrayed him, but Dantes eventually becomes the Count of Monte Cristo and returns to face Mondego. The pair engage in a sword fight which culminates in Dantes stabbing and killing Mondego.