Sidney's second secretary of the novel. She's a slightly older woman who at first appears to be kind and maternal. She sends Kit paper dolls and is very sweet and accommodating in her correspondence with Juliet. When she arrives on Guernsey in Sidney's stead to fetch the letters written by Oscar Wilde, however, Juliet learns the truth: Billee Bee is actually Gilly Gilbert's lover and co-conspirator, and she hopes to steal the letters for Gilly. As Billee Bee tries to leave the island, Isola and Kit accost her and manage to take the letters back.