Martha Cox is morbidly obese.
In the song Stick to the Status Quo Martha reveals that even though she is morbidly obese, she is an amazing hip-hop dancer.
Martha works at the Lava Springs country club as part of the kitchen staff. She is notorious for stealing the high-calorie foods.
Martha becomes a cheerleader because the school decided to set "accepting standards" and even the obese students make the team. She attends prom with Jason Cross and participates in a final musical with her friends.
- She was supposed to be a one shot character in the Stick to the Status Quo song, but was brought back by popular demand.
- Her birthday is stated as two different days in the books.
- She is morbidly obese.