Bernadette Rostenkowski is a fictional character from the popular television sitcom The Big Bang Theory. Portrayed by actress Melissa Rauch, she is introduced as a microbiologist and the love interest of Howard Wolowitz. Bernadette is known for her petite stature, strong personality, and impressive career achievements. Throughout the series, Bernadette evolves from a waitress to a successful scientist, showcasing her intelligence and ambition. Her character often balances her professional life with her role as a wife and later a mother, adding depth to her storyline and making her a beloved character among fans.