LIsa

Lisa has yellow skin, blue eyes (although the pupils look like 2 black dots just like the other characters), and a blonde "starfish" hairstyle that is styled into eight points and matches the color of her skin. She doesn't have any visible hairline. She's usually seen wearing a short, strapless red-orange dress with a zigzag hem, matching red-orange Mary-Jane shoes, and a white pearl necklace (given to her by her mother Marge). She's 4'2" tall and is 8 years old.

Lisa is an innovative, insightful, a sometimes girly, cute, slightly shy, sometimes sassy, and extremely intelligent girl, far exceeding the standards of a second grader especially in Springfield. Part of her intelligence is due to being so dissociated from her idiotic father whilst growing up and it was strongly implied that her brains were a result of her grandmother; Homer could never keep up with his daughter's startling intelligence due to his slow wit and stupidly, his laziness and their contradicting vices and opinions caused a strained relationship and she practically grew up without a father figure, specifically not a model one (although Homer probably wouldn't have been much help even if he was involved in Lisa's life). As intelligent as she is, her family never encouraged her gifts, and her school lacked the resources to blossom her IQ further but overall, Lisa has the most promising future. Since she was a baby, Lisa has displayed intellectual independence from changing her own diapers and solving mathematical solutions when she was only an infant. She could be classified as a child prodigy.

Her overall role in the Simpson family is depicted as the voice of reason. Despite her young age, Lisa is a good girl and has a strong sense of right, wrong, and morality; and she is always there to contradict Homer, Bart and on one occasion Marge whenever they do something reckless, idiotic or illegal, doing her very best to sway them to the path of the righteous due to fearing greatly for her father and brother's immortal soul but her standing as an outsider in her own family cause her to be ignored despite her best intentions. In an argument, Lisa's ethical and logical viewpoint almost always gives her the moral high ground, her family also realizes that Lisa is usually right whenever they do something immoral but Homer's tendency to ignore her, uses the excuse of age to send her to her room when they realize that they are in the wrong. In earlier seasons, however, Lisa has been depicted as intelligent yet not as mature due to her squabbling and physical fights with Bart, but she has developed into a more practical being yet her young age also makes her sense of right and wrong slightly malleable at times as she has shown to engage in childish and reckless behavior, proving herself to be like any other Simpson but more grounded and mature. Despite her above-average intelligence, she displays tendencies average for kids her age, such as obsessing over celebrities and playing with dolls.

Despite her young age, Lisa is extremely passionate about ideologies and other social movements. She has been shown to support PETA (although she has eaten eggs and dairy) and the Free Tibet movement, is highly against animal cruelty and has adopted a diet of vegetarianism from Season 7; she would later on become a full-on vegan, though this has shown to be more of an occasional feature rather than a permanent one. She encourages the idea of feminism, women's rights, and the crusade against objectification and stereotypes of women. Lisa's role models and ideals are based on Mohandas Gandhi's enforcement of nonviolent pacifism and Emmeline Pankhurst.

While her social movements are generally considered to be heroic, Lisa's reasoning is not solely to make the world a better place. A life of being shunned and ignored by her family has developed attention-seeking traits and a desire to be heard, once going to a dig site solely for the basis to complain about it, an area where she is usually ignored further. She used to force her beliefs on others due to a sense of self-righteousness and moral superiority, specifically her vegetarianism, but Apu also taught her a degree of tolerance for others' beliefs. Lisa is against ignorance on others' behalf, believing the truth is the truth and is unable to be dissuaded no matter what it was, which she learned from Marge. Without anyone else caring she continued to pester that the town founder, Jebediah Springfield was in actuality a murderous pirate and only refrained herself from revealing the truth when she realized how it brought the town together.

At her school, Lisa is considered to be a nerd because of her bookish and quiet nature. A teacher's pet and proud of it, she's depicted as an introvert with few friends and those she does have are as much as a nerd as she is. Her lack of popularity is generally purposeful yet her lack of social skills and different hobbies to what is considered fun to the rest of the girls leads her to want more friends. On one example she changed her personality to fit a more rebellious nature like Bart and actually gained an entourage of friends at the Flanders beach house but when her true academic nature was revealed, they continued to befriend her due to viewing her as a kind, gentle person rather than just a nerd. Lisa has had a few boyfriends, though all of them were brief, despite her status as a geek such as Nelson Muntz, Ralph Wiggum and Colin.

Extremely nonathletic, she fails at sports completely, and her liberal stance and high intelligence gives her little bonding ground with her peers and Homer who is also passionate about sports and connects with Bart more for this reason. Lisa is so weak that she could barely through a piece of paper into a rubbish can that was one away. However, she also displayed an uncharacteristic level of hand-eye coordination when she caught an incoming hockey puck from Apu and proved herself to be an extreme hockey player when she was a goalie. This non-athleticness is further shown when she joins a ballet team where the other members of the team have a smoking addiction. Initially, Lisa denounces them, claiming to not be allowed to smoke. She then begins to inhale second-hand smoke, before eventually becoming addicted to cigarettes. The episode ends with her addicted to nicotine. Even showing her nicotine patches in the last few seconds. This implies that she never actually got help with her addiction and continues to be an addict. However, most likely, as it is never further mentioned, that she is still addicted. The nicotine patches were never shown again.

Similar to Bart, Lisa's high academic intelligence and her desire to go far in life is greatly driven by her future goals. Bart never focused on his book work as he and basically everyone else knew that he would amount to very little when he grew up whereas this is the opposite for Lisa who saw the potential in her life to achieve fantastic goals. When her career aptitude test came back that she would likely become a housewife when she grew up and her music teacher told her she could never achieve her dream of a jazz musician on account of "stubby fingers", crushed her dreams. After this, the quality of Lisa's work and behavior declined drastically as Bart's improved exponentially after his career aptitude came back that he would become a police officer, such as refusing to go to band practice, encouraging the bad girls to deface Skinner's puma statue and being rude to her teachers. She went as far to steal everybody's Teacher's Editions, a line that even Bart Simpson would not cross. Lisa would have undoubtedly become an even worse rebel than that of her brother if Bart hadn't taken the blame for her crime. That said the prospect of a dull future also encourages Lisa to study further rather than immediately omit defeat as she did her very best to not become a housewife like Marge when their paths became very similar.

Overall, though, Lisa's tendency to lash out towards her family is based on the beliefs that they don't understand her rather than actual spite. This proves to be true as jazz is the only thing that expresses her inner thoughts and how she is feeling whilst her family only silence her creativity further due to their great annoyance with her saxophone. She often embraces relationships with other paternal figures that encourage her to embrace her passions to fill the void that her real lazy and uninterested father left. When she became depressed in the second season and none of her family seemed to understand the reason behind this, opened up more to the troubled jazz musician, Bleeding Gums Murphy who told her to sing what she felt helped her emotional state greatly. She became deeply close to her substitute teacher, Mister Bergstrom, who again noticed and encouraged her intelligence to blossom. Over time, Lisa, although embarrassed by her family, is no longer ashamed to be a Simpson.

One of her negative traits would be her penchant for narcissism. In one of her daydreams, she envisioned herself as bringing about world peace and being revered by world-famous scientists, chanting in her presence "we're not worthy". She prides herself on her intelligence and integrity but if her ego is at risk, displays a willingness to breach her morals such as sabotaging her rival Alison's diorama at the school fair, humiliating her in front of her peers. Even so, Lisa's conscience is too strong to commit an unethical act and not punish herself such as giving herself an F for her test which she cheated in and apologizing to Alison for her act of sabotage.