Elle apparaît la première dans l'épisode "Incendium" et devient dans les saisons suivantes la première petite-amie de Finn avant de la quitter. To start, Finn has had a crush on PB since the first episode. But, PB rejected Finn when he tried to get close to her which she recalls as weird in the episode, "Incendium." Afterwards, Finn found a new love interest: Flame Princess.