MarthaSmith is a minor character that appears in the series. She is mostly seen in angry mobs (even leading one in the episode "The Krabby Kronicle"). She is also a professional harpist in an orchestra.
Martha is a dark aquamarine fish who wears a light purple dress and red shoes. She is pretty tall in height compared to others. She also carries a purple purse.
Martha is sometimes seen with Harold. She appears to be very rich. Martha is usually mad at Mr. Krabs, and hits him with her purse, or leads angry mobs against him. She owns a pickle store in the mall which is shown in the episode, "Mall Girl Pearl."
In "Wigstruck," Martha is seen in a movie saying, "It's true John, this isn't my real hair, I stole it!" and she takes off her wig that she was wearing.