The Villain Twins are a pair of thirteen-year-old identical twin sisters named Molly and Holly. Molly's villain name is 'Killer Bee', and she always dresses in a yellow and black-striped long-sleeved full-body rubber jumpsuit with a bee stinger and a pair of bee wings on the back, a pair of yellow swimming goggles with black lenses, a pair of yellow and black-striped rubber gloves, a pair of yellow and black-striped boots and a black utility belt. Holly's villain name is 'Fiendish Fairy', and she always dresses in a pink sparkly long-sleeved full-body rubber jumpsuit with a red star in the center and a pair of purple fairy wings on the back, a pair of lavender swimming goggles, a pair of fuchsia rubber gloves, a pair of violet rubber boots and a magenta utility belt. Molly has the power to fly and sting others, while Holly has the power to fly with her wings and make mischief with her wand. They live in an underground lair that is surprisingly not used for plans to take over the world. Instead, they're using the lair to invite some little hero and villain girls to live with them!