Full House/Gia Mahan
Gia Mahan is Stephanie's best friend in the later seasons.
At first Stephanie and Gia don't like each other. Eventually, they become best friends. Gia is not good at school. Stephanie once magnified her report card and put it on a memoboard out of revenge. Her parents are divorced. She lives with her mother, Claire. She's very adventurous and likes doing dangerous or forbidden things. She prefers to go her own way, and often doesn't listen to what others tell her to do.