The samurai sword featured in Kill Bill is commonly referred to as "The Bride's Sword" or "The Bride's Katana." In the movie, the protagonist Beatrix Kiddo, played by Uma Thurman, wields this sword as she seeks revenge on her former allies. The sword itself does not have a specific fictional name within the film's storyline. It is primarily associated with the character and is recognized as her weapon of choice throughout the movie.