Marsha has dark brown skin and hair that is tied up into a bun. When her hair gets undone, it is revealed that she actually has a tight, curly afro. She wears a frumpy blue sweater and has a large nose.
A very straight-laced girl, Marsha is very cautious, shy, and timid. She is often the one person to see the supernatural activity going on at Mina's house and tries to warn her friends about it, but they usually don't listen to her and pick on her. What Marsha lacks in winning Mina and Becky's respect, she makes up for it in being a true friend. Marsha seems to be the smartest of the three and is the most serious when it comes to schoolwork
Mina is a foil to Marsha. While Marsha is timid and savvy, Mina is hyperactive and energetic. Marsha often tries to warn Mina about the dangers in her house, but Marsha doesn't really earn Mina's respect. Nevertheless, they truly care for each other as friends.
Becky usually picks on Marsha because of how nervous and skittish she is, and the fact that she always is pessimistic. Despite this, the two remain friends and still hang out together.
Marsha and Scott don't really have much chemistry, since they don't interact in a lot of episodes. But they've never been shown to be at odds.
- Marsha is probably the only character to receive the short end of the stick more than Chester does.
- In On Mina's Secret Service, she adopts Lugosi as her pet and calls him "Rhonda" after mistaking him for a girl.
- Marsha appears the most out of all of Mina’s friends.
- According to Jessica Borutski, she is around same age as Mina.