Beth Dixon is an heiress and research assistant who became the heroine Mrs. Wonderful after inheriting the wonder power from her late husband, who was the superhero Mr. Wonderful. In Amazing Woman's reality, it was she and not her husband who died and she who was Amazing Woman's biological mother. She is a good four to five inches shorter than Amazing Woman, but otherwise looks a lot like her.

She's a bit of a hot head and a Pollyanna. She still pines for her dead husband and doesn't quite know what to make of the older, alive version she meets in the story.