Beth Smith is the daughter of Rick Sanchez and Mrs. Sanchez/Diane Sanchez, the wife of Jerry Smith, and the mother of Summer Smith and Morty Smith, she is also the daughter-in-law of Leonard Smith and Joyce Smith, and the granddaughter of Rick’s Father and an unnamed woman. She currently acts as the mother and the daughter of the Morty Smith and Rick Sanchez from Dimension C-137, respectively. She is currently employed as a veterinary surgeon at St. Equis Hospital.
History
The details of Beth’s history are relatively unknown, she was born from Rick Sanchez and Mrs. Sanchez/Diane Sanchez, she has recounted herself as a “bright-eyed” woman from Muskegon, Michigan in “Meeseeks and Destroy”. At some point during her childhood, her parents’ marriage deteriorated amid unknown circumstances and her father left her mother. Beth blamed herself for her parents falling out, and seeing her father as an intelligent scientist compared to her mother, Beth came to idolize her father and blamed her mother for “chasing off the dad with the guts to leave”. It is revealed in “The ABC’s of Beth”, that at some point of her childhood, Beth became an insane and psychotic little girl. She began to ask her father Rick to create toy-like weapons to harm other children. Being an adult, Beth excused that she asked that  “spend time with her father”. Rick, aware that the increasing danger that would represent his daughter, created a dream world for his daughter, Froopyland, in order to keep the other children of the neighborhood safe. Beth managed lá»›n take one of her friends, Tommy, Froopyland, where, according to Tommy, she pushed the child into a honey swamp, in an act of jealousy with Tommy and his good relationship with his father. Then she autoconvinced herself that Tommy got lost in Froopyland. Beth aspired become a heart surgeon as an adult, but during high school, when she as already 17 years old, she went prom dance with her classmate, Jerry Smith, possibly out of pity, and they had sex, and she became impregnated with her first and only daughter, Summer. She contemplated aborting the fetus, later justifying that “everybody thinks about it”, but managed to get into college and become a veterinary surgeon, specializing in horses, eventually finding work at St. Equis Hospital. She also decided to marry her boyfriend Jerry and a few years later (impregnated at the age of 20 years old), had their second child and only son, Morty.
Appearance
Beth has shoulder-length blonde hair. She wears a red collar shirt, blue pants, and white shoes. As a little girl, Beth wore overalls with a red shirt, long white socks, and black Mary Janes, as well as a green hair-clip and two different colored wristbands.
Personality
Beth is an intelligent, ambitious, and independent woman who suffers from a variety of deep-seated insecurities. A dedicated veterinary horse surgeon, she is the family’s main breadwinner and often tries to do the best for her family based on this sense of responsibility. She is highly insecure about her profession as a horse surgeon and is a quick snap at the implication she is not a ‘real’ surgeon or a ‘real’ veterinarian
Although Beth can sometimes be derisive of what she sees as weakness, dependence or emotional vulnerability, she can still be compassionate and caring at times, more so than her father. When she and Jerry accidentally hit a deer, her first concerns were to help and assist it and Beth would stop at nothing to bring it back health. She often expresses grave concern for Morty’s education and health, when they are not related  Rick, and is considerate of the consequences on her children of her leaving Jerry
Beth has a superiority complex, believing herself at times to be above others as a way of hiding her insecurities, and has extended this behavior  those such as her son Morty, particularly when he is shown taking care of his own son, and her husband, who unwittingly feeds her insecurities by implying she was not a ‘real’ surgeon. Her genius father’s preference for her over her ‘idiot’ husband has, in turn, fed her feelings of superiority, especially towards Jerry. She also exhibited resentment towards being patronized during her surgical work, such as by her co-worker, Davin when he lets her know they’re losing a patient, or when another veterinarian implies she cannot save a deer. These feelings of superiority, however, seem to disappear quickly when Rick is removed from her life or even when she merely feels more confident in herself.
The episode also revealed that Beth was very lonely as a little girl, and may very well still be, having asked Rick to make her a whip that would make people like her, and a sentient switchblade. She was also envious of her friend Tommy, and his father who was present in his life, which lead her to abandon him in Froopyland, mirroring her father’s image, and roused her to become a better person by her own standards.