Kalifa is the Number 2 of the CP-9 and posed as the secretary for the mayor of Water 7, Iceburg. She's a powerful Six Powers fighter who ate the Bubble-Bubble Devil Fruit.
One Piece '3D2Y' Overcoming Ace’s Death! The Oath with Luffy’s Crewmates!
A TV special that shows more of Luffy's training during the timeskip and features a new villain, Byrnndi World "The Destroyer of the World".