Lisa Marie Simpson (born May 9 1981) is the elder daughter and middle child of the Simpson family and one of the two tritagonists (along with Marge,) of The Simpsons series. In Homer and Lisa Exchange Cross Words she is also known as Lisa Bouvier. She was named after a train called Lil' Lisa on her parents' 1st anniversary. She is a charismatic 8-year-old girl, who exceeds the standard achievement of the intelligence level of children her age. Not to everyone's surprise, she is also the moral center of her family. In her upbringing, Lisa lacks parental involvement of Homer and Marge, which leads to hobbies such as playing saxophone and guitar, riding and caring for horses, and interest in advanced studies. In school, Lisa's popularity is affected by those who view her as a geeky overachiever, which leaves her with only a few friends. She focuses on her goals and strives to reach her potential, and at the age of eight, she is already a member of Mensa with an IQ of 159. Her lack of parental involvement also leads to her lashing out to those who she deems lower than her or even above her. She has extreme jealously from time to time and will do whatever it takes to reclaim her title as the smartest; but only if she deems it necessary. Otherwise, she's the intelligent one who usually thinks things through.

lisa holds the title of smartest of her family for quite some time, but maggie, seems to be way smarter than she is given credit for. lisa is a good girl who rarely deviates from the good side, so much that she makes it a point to correct or call out others when she feels they could be doing better. While frequently disappointed by homer, she loves him more than he deserves

one of lisa biggest skills is her saxamaphone, as homer calls it, from being booted out of music class, to playing alongside bleeding gums murphy, lisa is extremely skilled at the uhm saxamaphone. she encounters a few setbacks but none the less, she is always full steam ahead, or is she?

lisa is a great middle sister, but deep down when she realizes that maggie could be smarter, she buries that deep down, but forgets to bury the jealously that goes with it, but, she is who she is and she is still smart!