Kalifa

Kalifa: Iceburg's secertary and the only female of CP9 group.

Personally
When we first see Kalifa in chapter 323 as Iceburg's secretary, she was seen as an serious classy-typed woman with hot tempered. She often says "that's sexual harassment" whatever been referred by her name. She was at first fiercely loyal to Iceburg and is always seen walking around with him.

But in chapter 341, she showed her true colors by aiding the attack on the Galley-La HQ dressed in a fancy franch-like clothes and is masked. She used the thorn whip as her weapon. In chapter 345 she was revealed as a secret Government agency known as the "CP9"

During the Enies Lobby arc, Kalifa became sly and crafty, especially when Spandam address her name, she enjoys to repeat "that's sexual harassment" to him.

However after eating the Devil Fruit and facing Nami in chapter 410 Kalifa was reduced to taking things lightly and was proved that she is not as bright as she was(such as mistooking Monster Chopper for Nami). Due to her rash attitude and her lightly-taken nature she was defeated by Nami.

Kalifa's Downfall
- in-depht information about the fight