Grace Sheffield, often called just Gracie by Fran, is the youngest of the three. On the show, she adopts Fran's Yiddish sayings, morals, and funky clothing choices.
Maggie Sheffield is Maxwell's oldest child. She's really shy and awkward, and is always worrying about finding love. Her and Fran bond immediately after meeting each other.
Brighton Sheffield often felt left out as the only boy, and he frequently fought with Grace and Maggie. He looks up to Fran and loves to deter her from dating. He fears she would stop being their nanny if she met someone.