Will Parry is a fictional character from the His Dark Materials series by Philip Pullman. He is a young boy who becomes a central figure in the story, known for his bravery and determination. Will is introduced in the second book, The Subtle Knife, where he discovers a portal to other worlds. Throughout the series, Will is characterized by his strong sense of responsibility and loyalty, especially towards Lyra Belacqua, another main character. He possesses the ability to wield the Subtle Knife, a powerful tool that can cut through the fabric of reality, allowing him to navigate between different universes.