Y.T. is a character from the science fiction novel "Snow Crash" by Neal Stephenson. She is a young, resourceful courier in a futuristic world where information and technology dominate society. Y.T. is known for her agility and quick thinking, often using her skills to navigate the challenges of her environment. In the story, Y.T. becomes involved in a larger conflict that revolves around a new virtual drug called Snow Crash. Her interactions with other characters, including Hiro Protagonist, help to drive the plot and explore themes of technology, culture, and identity in a rapidly changing world.