Though it may look like said witch has a rather unfortunate patch of eyebrow between her eyes, rest assured that is just what makes her “mean”.
From that, I can only assume years and years of ridicule at the hands of peers has caused her to, more than once, exact her vengeance upon her tormentors ala Stephen King’s Carrie.
The fact she had the misfortune to be named Hello Kitty didn’t help matters.
Or, Cara was just having to come up with something on the fly to explain the misplaced scribbles .
I prefer my version of the story.