Harmony is a minor character in Toy Story 4. She is Margaret's granddaughter, and Gabby Gabby wanted to be adopted by her. But it seemed as though Harmony didn't want to adopt her and would prefer to have imaginary friends, or she already had some dolls and didn't want another. Gabby Gabby said to Forky ,"My Harmony is perfect," after Forky thought Harmony lost Woody (Woody escaped from Gabby Gabby's dummies, the Bensons, and had to lay on the floor because he knew humans were coming). If you look closely at her physical appearance, she closely resembles the girl in Gabby's book, so Gabby thought she could make the story in her book come true by being with Harmony.