Bella was a fire warden with Juliet during the Blitz. Juliet asks Bella to write a character reference for her for Amelia Maugery. Through Bella's letter, it's clear that she's a stickler for rules and regulations and thinks little of books. She disparages Juliet's humorous writings under the name Izzy Bickerstaff and finds Juliet's love of books a complete mystery, but she does say that Juliet can be trusted to keep her word.