Amanda has short dirty-blonde hair with a pink bow on the right side. She wears a pink baby suit with a white heart on the left side of her chest.
Despite being a baby, Amanda can fluently speak English and appears to be shaped largely by her family and religion, Mormonism.
Amanda is the youngest in the family and is close to both of herparents. They are the people who taught her The Book of Mormon.
Amanda has three brothers and one older sister. They all share a strong bond and are friendly to each other. They never fight and enjoy spending time together. They all play musical instruments, and perform a song for their parents and Stan Marsh in "All About Mormons".