Mrs. Paxton is Callum and Sephy’s math teacher at Heathcroft. To Callum’s extreme relief, and despite her being a dark-skinned Cross, she’s one of the only teachers who treats Callum like an actual person and not a second-class citizen who doesn’t belong in school. She even argues with Mr. Corsa about how the nought students are treated at school and insists that the administration must crack down on the bullying noughts suffer, or risk losing bright students. Mrs. Paxton is also the one to reveal to Callum that Mr. Jason’s mother was a nought.