Balthamos is an angel in the The Amber Spyglass. Balthamos and his lover, Baruch, are both angels in rebellion from the Kingdom of Heaven. They seek to become part of Lord Asriel's army of angels and overthrow Metatron, the acting Regent of The Authority Both angels find Will Parry at the end of The Subtle Knife; because Will is the bearer of the subtle knife, they hope to bring him to Lord Asriel. However, Will's companion Lyra Belacqua has been kidnapped and Will refuses to go to Asriel until Lyra is found. The angels agree to accompany Will without question until she is found.