Getting the most out of the unexpected, the concept introduces Abby, the one and only girl with a Rainbrow. What’s a Rainbrow? Well, it’s a bushy rainbow-colored unibrow covered in Skittles and is caused by Skittles-roots. Growing up with a Rainbrow has left Abby a little socially awkward. And as a new student trying to make friends, she’s an easy target for those who want to take advantage of her sweet gift.