She looks similar to Mrs. Puff: overweight, short, stubby fins, and blonde hair color. The only difference between her and Mrs. Puff are their hair and clothing. She wears a light purple dress and a long magenta feather in her hair. Also, her hair is longer and curlier.
At the end of the episode as she lets out her anger and stomps on Dead Eye Plankton multiple times. She is the only other known family member of Mrs. Puff, the other being Mr. Puff.