Brittany SquarePants

Brittany Masculine (nee SquarePants) is SpongeBob's muscular aunt.

Biography
She was born to Grandpa and Grandma SquarePants. She is the youngest child in the family, and was often bullied by kids in her school. She decides to get herself muscular to stop herself being bullied.

She later met Paul Masculine, the guy in the gym who had the same problem as her, and they married, having two children: BlackJack and Larry.