Madame Oxentiel was a Gallivespian who succeeded Lord Roke as the commander of Lord Asriel's spies. She flew on a bird, a blue hawk she inherited from Lord Roke, unlike Chevalier Tialys and Lady Salmakia who rode dragonflies.
Lord Asriel gave her the responsiblity of locating and protecting Lyra, Will and their dæmons until they were reunited. She led the Gallivespians against Metatron's forces and, along with the panserbjørne and ghosts, helped Lyra and Will escape with their dæmons into the mulefa world. She had stiff grey hair and a clear voice.