Summer Smith is a supporting character and the older sister of Morty. Summer attends Harry Herpson High School along with Morty. She is a teenage girl who finds her family life to be dysfunctional.
Summer is a teenage-girl of average height and a thin build. She has a light skin-tone and ginger hair. Her facial features take after Jerry's, having an oval head and pointed nose.
Her most common outfit has been a magenta tank-top, white capri-pants, and black slip-ons. She usually has her hair pulled back in a high ponytail.
Summer has some personality traits of a typical American teenager. She wishes to be popular among her peer, and finds the antics of her family to be dysfunctional; she genuinely cares about them, however. She's very attached to her phone and social media, taking videos of Snuffles when he became super-smart, and shuddering at the thought of Jerry joining Facebook.
It is shown that Summer can be jealous of Rick and Morty's close relationship, and she can sometimes feel ignored by her grandfather. While Rick tries to keep her at a distance, the two of them have gone on their own adventures, including on the planet Gazorpazorp. Her complex of being ignored by Rick manifests into a connection with the Devil in "Something Ricked This Way Comes".
Although Summer is not as scientifically-minded as Rick, she does possess an above-average intelligence. Summer is shown to be whip-smart and nimble-witted, at least compared to rest of her family.
Summer appears to have a habit of "peeing her pants." Summer has shamelessly admitted to wetting herself.
- Unlike her brother, Summer usually addresses Rick as "Grandpa Rick" or just "Grandpa".
- Summer has a job, making her one of the only two members of her family who has an actual job.
- Summer is the only person who knows about the deaths of her dimension's Rick and Morty and their subsequent replacement by the real Rick and Morty. (See episodes "Rick Potion No. 9" and "Rixty Minutes")
- In the episode "Rixty Minutes", it was revealed that she was an accident, conceived while Beth and Jerrywere still in high school.
- If Summer was never conceived, Morty would never have been born, more or less even exist.
- Summer has appeared in every episode except for "M. Night Shaym-Aliens!" and "Mortynight Run".
- Summer's implanted memory in Total Rickall is a magical rainbow lamb named "Tinkles."
- She appears to be self-conscious of her figure, as shown in the game, Summer has a bra way too big for her as pointed out by Morty.
- However, in the dream of Goldenfold's dream version of Mrs. Pancakes, her boobs (and butt) are much bigger than they would appear under her clothing. On the other hand, this was not the real Summer, and Goldenfold could have re-imagined her body proportions to be much bigger to be more enticing.