Haydee, spoken of by Monte Cristo to de Villefort as his "slave," first appears in Chapter 47 of Dumas's great novel. As the "lovely Greek" who has been the Count's companion in Italy, Haydee is accompanied by the count's man, Ali. She speaks to Monte Cristo with great tenderness, kissing his hand as he responds with "gentle gravity." He is her protector, having bought her her freedom.
Despite his reserve with her, Monte Cristo gives orders to the waiting-women to treat Haydee with "all the respect and deference" they would give a queen. She reclines on luxurious cushions in her apartments that are separate from the rest of the house. As she lounges in the Eastern fashion with a small golden cap adorned with pearls atop her head and delicate slippers that curl up at the toe, her clothing is magnificent, brillant silken hues with fringe, and her cap of gold, embroidered with pearls is splendid.
The extreme beauty of the countenance, that shone forth in loveliness that mocked the vain attempts of dress to augment it, was peculiarly and purely Grecian; there were the large, dark, melting eyes, the finely formed nose, the coral lips, and pearly teeth, that belonged to her race and country. And, to complete the whole, Haidee was in the very springtide and fulness of youthful charms -- she had not yet numbered more than twenty summers.
When the count visits her, he reminds Haydee that she is now free since they are in France, but she is entirely devoted to him, declaring that Monte Cristo's death would effect her own.
Later, in Chapter 77, Albert de Morcerf visits the Count and is introduced to Haydee. He also learns that she is the daughter of Ali Pacha and the beautiful Vasiliki, whom his father, the Count de Morcerf served. Unbeknownst to Albert, of course, is the fact that his father betrayed Ali Pacha, stole his treasures, and sold Haydee and her mother into slavery for four hundred thousand francs.. This information all comes out after an investigation is begun regarding reports about de Morcerf in the newspapers. In Chapter 86, Haydee verifies the truth of these reports that condemn the Count de Morcerf at the trial of Ferdinand Mondego, now Count de Morcerf. Even the Count of Monte Cristo did not know these truths.