Lisa Simpson

Lisa Marie Simpson is the older daughter in the Simpson family.

The Simpsons
She first appeared in the Ullman short "Good Night", where she had longer spikes in her hair and there were more of them - 13 spikes. Her first the Simpsons appearence was in "Simpsons Roasting on an Open Fire" where she got shorter spikes. There were also only eight of them then. She is portrayed as a major character, who is very smart, enjoys school, but also a bit childish as she watches Ki-Ya Karate Monsters, Itchy and Scratchy, playes with Malibu Stacy dolls and loves ponys.

The Simpsons Fanfiction series
She has become more rude, she wears more different outfits and doesn't get bullied anymore. Rather hangs out with the bullies (not the regular bullies so much, but rather Terri and Sherri, who usually bully her in The Simpsons). Also her IQ is raised from 159 to 216 because S01E03 involves fight between Martin and Lisa and it's revealed that they have the same IQ.