The main characters in the 'Subtle Knife' graphic novel include Will Parry, a brave and curious boy who holds the Subtle Knife. Lyra Belacqua is another main character. She has a daemon named Pantalaimon. Their paths cross in the story as they both get involved in the complex events related to the Subtle Knife. There are also characters from different universes, some friendly and some hostile, that they interact with during their adventures.
One of the main characters is Will Parry. He is a young boy who comes into possession of the Subtle Knife and plays a crucial role in the story. Another important character is Lyra Belacqua, who is also involved in the adventures across different worlds in the graphic novel.
In the 'Subtle Knife' graphic novel, Will Parry is a central figure. He's a normal boy until he stumbles upon the Subtle Knife. Lyra, who has her own set of adventures in the overall 'His Dark Materials' series, also has a significant part to play in this graphic novel. There are also other characters like the various beings from different worlds, such as the angels and the strange creatures that they encounter during their journey.