Monsieur de Morcerf
Chapter 3 - Les Catalans
Fernand — aliases: Catalan
Fernand confronts Mercédès with a desperate plea for her love but is coldly rebuffed. He retreats to the nearby wine seller, seething with jealousy after watching Edmond and Mercédès from afar, and barely suppresses his anger when invited to the engagement festivities.
Chapter 4 - The Plot
Fernand — aliases: Catalan, young man
Fernand confesses his obsession with Mercédès and his willingness to kill Dantès, but is dissuaded by fear of Mercédès's reaction. He agrees to Danglars's alternative plan, listens as the denunciation letter is composed, and secretly pockets the discarded note before rushing to send it to the Crown Prosecutor.
Chapter 5 - The Betrothal
Fernand — aliases: the disappointed lover
Fernand attends the feast, suffering visible pallor and trembling as he watches Dantès's happiness. He vanishes during the arrest, presumably to ensure the letter is sent, and returns later to offer support to Mercédès, attempting to maintain his role.
Chapter 9 - The Evening of the Betrothal
Fernand
Fernand follows Mercédès to Les Catalans, kneels beside her bed, and covers her icy hand with ardent kisses as she mourns Edmond throughout the night.
Chapter 41 - The Introduction
Morcerf / Comte — aliases: Comte de Morcerf, General
Morcerf receives the Count with condescending alacrity and engages him in conversation about his military service and political career, unaware of the stranger's true identity. He charms easily by the Count's flattery and leaves for a sitting in the Chamber of Peers, leaving his wife to entertain the guest.
Chapter 53 - Robert le Diable
Morcerf / General — aliases: Comte de Morcerf, Comte
Morcerf arrives at the opera and joins the Baroness Danglars's box. He is introduced to the Count, engages in conversation, and is embraced by the Count, causing Haydée's distress. He admits his past service under Ali Tebelin.
Chapter 86 - Judgement Is Passed
Morcerf / Monsieur de Morcerf / Fernand Mondego / Fernand / Count de Morcerf — aliases: The Count, Colonel, Frankish officer, Lieutenant-General
The Count de Morcerf enters the House of Peers unaware of the scandal, delivers a passionate defense citing a ring and letters from Ali Pasha, but collapses into desolation when Haydée produces a bill of sale identifying him as the traitor Fernand Mondego before fleeing the chamber in shame.