Bianca Castafiore, the "Milanese Nightingale", is a fictional character in The Adventures of Tintin, the comics series by Belgian cartoonist Hergé.
She is an opera singer whose demeanor comically aggravates Captain Haddock's stereotyped sea-captain misogyny as she pops up in adventure after adventure. Castafiore is comically portrayed as narcissistic, whimsical, absent-minded, and talkative, and seems unaware that her voice is shrill and appallingly loud. She is also wealthy, generous and essentially amiable, and has a will of iron.
She will not go with Tintin and Snowy on their adventures but she can help theme out when they meet each other again,