Mathilde is a character from the short story "The Necklace" written by Guy de Maupassant. She is portrayed as a beautiful but dissatisfied woman who dreams of a more luxurious life. Mathilde feels that she deserves wealth and social status, leading her to borrow a stunning necklace for a high-society event. After losing the borrowed necklace, Mathilde and her husband, Monsieur Loisel, work tirelessly for ten years to repay the debt incurred to replace it. In the end, she discovers that the original necklace was a fake, highlighting the themes of vanity and the consequences of her desires.