Role in The Simpsons
The Simpsons uses a floating timeline in which the characters do not physically age. The show itself is perpetually set in the year of broadcast (except for occasional flashbacks and flashforwards). In several episodes, events have been linked to specific time periods, although this timeline has been contradicted in subsequent episodes. Lisa's year of birth is given in "Lisa's First Word" (season 4, 1992) as 1984, during the Summer Olympics. The episode "That '90s Show" (season 19, 2008), however, contradicts much of the established backstory; for example, it presents Homer and Marge as being childless in the late 1990s. Despite this, Lisa is portrayed as being 38 years old. Lisa is a lover of music, with jazz as her favorite genre; she specifically singles out Miles Davis's 1957 album Birth of the Cool as her favorite album. She enjoys and excels at playing the saxophone and became friends with jazz musician Bleeding Gums Murphy, whom she regards as an idol. Murphy helps pull Lisa out of her depression in "Moaning Lisa" (season 1, 1990). She is later deeply saddened by Murphy's death in "'Round Springfield" (season 6, 1995).
Lisa has had a few brief relationships with boys, including Ralph Wiggum in "I Love Lisa" (season 4, 1993), Nelson Muntz in "Lisa's Date with Density" (season 8, 1996) and Colin in The Simpsons Movie (2007). Bart's best friend Milhouse Van Houten has a crush on her, but despite dropping unsubtle hints about his feelings, he has been unsuccessful in winning her affection. Her voice actor Yeardley Smith said Muntz would make a good match for Lisa. In 2019, Simpsons showrunner Al Jean said he saw Lisa as being "possibly polyamorous" in the future. In the Season 23 episode "Holidays of Future Passed" Lisa is shown holding hands with an unnamed dark-haired woman in a photo, and then shown in a second photo where she is holding hands with two different women at once, suggesting polyamory; she later ends up with Milhouse. However, this episode is non-canon.
At age 8, Lisa's high intellect and left-wing political stance creates a barrier between her and other children her age. She is a loner and a social outcast. Lisa is a vegan, a bibliophile, a strong environmentalist, a feminist, and a Buddhist. Lisa's character develops many times over the course of the show: she becomes a vegetarian in season 7, converts to Buddhism in season 13, and becomes a vegan in season 32. A strong liberal and activist for peace, equality, and the environment, Lisa advocates for a variety of political causes (e.g. standing against apartheid in South Africa and supporting the Tibetan independence movement) which sets her against most of the people in Springfield. However, she can also be somewhat intolerant of opinions that differ from her own, often refusing to consider alternative perspectives and showing a feeling of self-righteousness. In her free time, Lisa enjoys many hobbies such as reading and playing the baritone saxophone.
Lisa is the most intellectual member of the Simpson family (she has an IQ of 159), and many episodes of the series focus on her fighting for various causes. Lisa is often the focus of episodes with "a real moral or philosophical point", which according to former writer David S. Cohen is because "you really buy her as caring about it." Lisa's political convictions are generally left-wing and liberal and she often contests other's views. She is a vegetarian, feminist, environmentalist and a supporter of gay rights, universal healthcare, and the Free Tibet movement. In a special Christmas message for the UK in 2004 Lisa showed her support for Cornish nationalism, even speaking the Cornish language to get her message across. While supportive of the general ideals of the Christian church in which she was raised, Lisa became a practicing Buddhist in the episode "She of Little Faith" (season 13, 2001) after she learned about the Noble Eightfold Path.
Lisa, despite being a child prodigy, often sees herself as a misfit within the Simpson family and other children due to possessing an unusually high level of intelligence. She shows characteristics rarely seen in Springfield, including spirituality and commitment to peaceful ways, and is notably more concerned with world affairs than her life in Springfield, with her rebellion against social norms being depicted as constructive and heroic, yet she can be self-righteous at times. In "Lisa the Vegetarian", an increasing sense of moral righteousness leads her to disrupt her father's roast-pig barbecue, an act for which she later apologizes. Like most children her age, she thinks in images rather than words. Episodes often take shots at Lisa's idealism. In "Bart Star" (season nine, 1997), Lisa, who is departing from her typically more genuine nature and apparently looking for a new cause to crusade over, defiantly declares that she, a girl, would like to join the football team. In the 1990s, it was considered odd to allow a girl to play football. However, when coach Ned Flanders reveals that several girls already play for the team, she hesitates and claims football is "not really [her] thing". She then expresses distaste about a ball made of pig's skin, but one of the girls informs her that their footballs are synthetic and that proceeds are donated to Amnesty International. Upset by being unable to gain moral superiority, Lisa runs off.
Lisa is said to have an IQ of 159, and in "They Saved Lisa's Brain" (season ten, 1999) she becomes a member of the Springfield chapter of Mensa. Even prior to becoming a Buddhist, Lisa at times is seen meditating. When unable to attend school due to a teachers' strike in "The PTA Disbands" (season six, 1995), she suffers withdrawal symptoms because of the sudden lack of praise. She even demands that her mother grade her for no obvious reason. In Planet Simpson, Chris Turner writes that these traits make Lisa more realistic because "No character can aspire to realism without a few all-too-human flaws."
Although she is wise beyond her years, Lisa has typical childhood issues, sometimes requiring adult intervention. One episode to show this is "See Homer Run" (season seventeen, 2005) where she goes through a developmental condition which causes her to get into trouble at school. In "Lost Our Lisa" (season nine, 1998), she tricks Homer into allowing her to ride the bus alone, only to become hopelessly lost and in need of aid from her father. Chris Turner writes in Planet Simpson that incidents like this illustrate that "Even when Lisa's lecturing like a college professor or mounting yet another protest, she never becomes a full-grown adult trapped in a child's body." In The Simpsons and Philosophy: The D'oh! of Homer, Aeon J. Skoble states that although Lisa is an intellectual, she is still portrayed as a character who enjoys normal childhood and girl activities, plays with Malibu Stacy dolls, loves ponies, obsesses over teenage heartthrobs such as Corey, and watches The Itchy & Scratchy Show along with Bart. He writes, "One might argue that this is typical childhood behavior, but since in so many cases Lisa is presented not simply as a prodigy but as preternaturally wise, the fondness for Itchy & Scratchy and Corey seem to be highlighted, taking on greater significance. Lisa is portrayed as the avatar of logic and wisdom, but then she also worships Corey so she's 'no better [than the rest of us]'." Lisa occasionally worries that her family's dull habits will rub off on her, such as in "Lisa the Simpson" (season nine, 1998) she worries that the "Simpson gene" will make her a dimwit later finding out the gene only goes through the male side.
She is also concerned that Maggie may grow up to be like the rest of the family and tries to teach her complex ideas. Chris Turner writes in Planet Simpson that "Lisa embarks on quests to find solace for her yearning spirit ... but the most reliable source of truth she finds is the one she always believed in: her family. It is from the other Simpsons that Lisa draws stability, meaning, contentment." Her loyalty to her family is most clearly seen in the flashforward "Lisa's Wedding" (season six, 1995), in which she must reconcile her love for them with the distaste of her cultured fiancé. In the episode "Mother Simpson" (season seven, 1995) she meets her paternal grandmother Mona Simpson for the first time. Mona is also well-read and articulate, and the writers used the character as a way to explain the origins of Lisa's intelligence.
