Justin - Monsieur Homais' apprentice and second cousin. He had been taken into the house from charity and was useful at the same time as a servant. He harbors a crush on Emma. At one point he steals the key to the medical supply room, and is tricked by Emma into opening a container of arsenic so she can "kill some rats keeping her awake". She however eats the arsenic herself, much to his horror and remorse.
"Madame Bovary" by Gustave Flaubert