A Gyptian woman and mother of Billy Costa. She was also Lyra's wet nurse in infancy, giving her a claim on Lyra's welfare.

The son of Ma Costa, one of the Gyptian children taken by the Gobblers. His disappearance is the inciting event for the Gyptian rescue mission.

Ma Costa's older son and Billy's brother, a strong and capable gyptian man. He rescues Lyra from kidnappers in London and later volunteers for the expedition north to find the stolen children.

Dick Orchard's gyptian grandfather, a large tough boatman who captains the narrowboat Maid of Portugal. He takes Lyra to the Fens and tells her stories of the secret commonwealth.

The son of the great John Faa, now leader of the gyptians in the Fens. He welcomes Lyra when she arrives seeking refuge among the boat people.