Dæmon. During Will's journey into the Land of the Dead in The Amber Spyglass, he is forced to separate from part of his soul. This turns out to be his dæmon, who had previously lived unseen inside him. As Will is still a child when this happens, his dæmon had not yet settled into one particular form.

Does will ever get a daemon?

Will possesses the subtle knife, which can cut through the fabric of the universe to other worlds. He is not from Lyra's world. Will eventually discovers that he has a daemon named Kirjava.

How does Will's dad have a daemon?

He accidentally travelled to Lyra's world where he became a renowned scholar and shaman. His dæmon was called Sayan Kötör and had the form of an osprey.