As a kindergartener, she met Mabel Atkins and they became best friends. Her father, Kelly got a job offer from another town, and moved away. In the new town, her father didn't want to deal with her, so he sent her to a boarding school during her childhood. Jessica didn't mind, she enjoyed her time at the school.
In high school, she moved back and met Mabel, who had new friends named Jeremiah and Jose. Jeremiah was Mabel's boyfriend and Jose was Jeremiah's best friend. Jose and Jessica felt pressure to date each other and became a couple. After they all graduated, they moved in together. However, seeing each other at school and hanging out is very different than living together. Jessica is shown to be very controlling and hot-headed. She doesn't admit it, but she wants to control Jose's life. Jose wants to become an athletic and play basketball, but Jessica may force him to become someone he's not.
Jessica is a feminist and does believe men and women deserve the same rights. However, sometimes she gets the best of herself and pushes men around. She had good intentions but sometimes gets too over-emotional. She is snobby as well, and has a superiority complex.