Lydia first appeared on June 9, 1986. She usually appears with Linus. Linus likes Lydia at first but soon begins to find her annoying and treats her the same way that he treats Sally. Ironically however, some later strips suggest Lydia may have a crush on Linus. Although Eudora is often considered the last major addition to the Peanuts cast, some may argue that Lydia instead holds this poition, considering she continued to appear for over a decade after her debut, albeit sparingly.