Billie doesn't just sing the blues, she lives the blues. Billie has a good heart, but she can be a total downer. She always sees glass as half-empty (even when it's full), and doesn't like to try new things. Billie has a big-sister relationship with Ruby, and admires her enthusiasm. Billie sings and speaks in a rough and breathy alto. Her catchphrase is "it's enough to make a girl feel kinda blue…", typically before breaking into song.