The Subtle Knife
Will Parry is one of the protagonists in Philip Pullman's trilogy "His Dark Materials", along with Lyra Belacqua. He first appears in the series at the start of the second novel, "The Subtle Knife", and continues through to the final book, "The Amber Spyglass". Introduced as a 12-year-old boy, he meets and befriends Lyra in the world of Cittàgazze and teams up with her in order to uncover the mysteries of Dust and the disappearance of his father many years previously. He takes possession of the Subtle Knife which he uses to aid Lord Asriel in his bid to destroy the Authority.