Summer Smith debuted as a central character in the pilot episode of the animated series Rick and Morty, which premiered on Adult Swim on December 2, 2013. Voiced by Spencer Grammer, she is depicted with long auburn hair, fair skin, and a slender build, frequently attired in casual fashion such as crop tops, jeans, and accessories reflecting contemporary trends. As the older sister of Morty Smith, daughter of Beth and Jerry Smith, and granddaughter of Rick Sanchez, Summer initially functions as the more socially adjusted member of the family, often absorbed in her phone, peer relationships, and typical pursuits amid the disruptions caused by Rick's multiversal exploits.

Summer's personality is characterized by sharp sarcasm, quick wit, and a pragmatic outlook that masks underlying vulnerabilities related to familial instability and self-worth. In early seasons, she exhibits stereotypical traits—preoccupied with popularity, crushes, and social media—while displaying frustration and detachment toward the household's chaos. However, her intelligence and adaptability become evident as she navigates crises, revealing a resourceful and occasionally cynical demeanor influenced by exposure to Rick's worldview.

Throughout the series, Summer undergoes substantial growth, evolving from a peripheral figure to a capable and assertive participant in adventures. Key developments include deeper sibling bonding with Morty, independence during her parents' separation in Season 3 (where she secures employment and confronts personal challenges), and increased competence in high-stakes scenarios, such as leading initiatives or employing cunning tactics in later seasons. By Seasons 6 and 7, she demonstrates heightened confidence, emotional maturity, and proactive involvement in family and interdimensional affairs, solidifying her transformation into a resilient, multifaceted character who balances concerns with extraordinary experiences.