Sarah Jost is a Swiss national who has been living in the UK since 2008. She works as a Housemistress and French teacher at a girls' school, which she considers an immersive course in character study. She's never been stuck in time, although her own experience of anxiety and her work to support students' mental health have inspired Lou's struggles and Louisms. Sarah lives in Buckinghamshire with her partner Luke and their adorable and destructive puppy Winnie.