Pibby was the main character of "Learning with Pibby", a preschool education show, until her world was corrupted by the Darkness, which took her closest friend, Bun Bun. After the apocalypse, she teams up with Alloy Boy and Melira in an attempt to unite fictional characters from across the multiverse and save the multiverse using the power of "love". Pibby is a reluctant hero, wanting to stay a child forever, but she is forced to grow up and become the hero that she needed to be from the start.