The Question and Answer section for The Necklace is a great resource to ask questions, find answers, and discuss the novel.
In my opinion, M. Loisel is the story's main victim because he spends his life working to pay for his wife's pride and mistake. It's hard to consider Mathilde a victim because if anything, she is only victim to her own pride and foolishness.
M. Loisel thought his wife would be pleased with the opportunity to attend a party. He believed she'd enjoy dressing up and going out.... mingling with people they never had a chance to mingle with. After all, this is what she spent her days...
This is more an assignment than a specific question. This is a short answer forum only.