Margles was a Martian woman who was once King Man's wife. As revealed in "You Forgot Your Floaties," she was taken away by the powerful deity GOLB, which encouraged King Man, then called Magic Man, to create a defense system in her image. However, this defense system ultimately failed, causing her to fall off Olympus Mons, a Martian volcano, which Abe Lincoln mentions was the beginning of Magic Man's jerky attitude.
Margles was a green Martian woman with medium length brown hair. She wore a purple dress and brown knee-high boots. She was also visibly shorter than Magic Man in the photo, though she may be sitting or leaning as she was giving Magic Man a hug in this photo.
- When the defense system mode is activated, her pose heavily resembles that of Éliphas Lévi's vision of Baphomet as the "Sabbatic goat". This may be symbolic because of the fact that she was created from nightmares and created to fend off a malevolent being.