The Fourth Raikage's assistant acts as a go-between for the Raikage and Kumogakure's forces, giving them his orders and keeping him updated on their progress.

She's a dark-skinned girl who is seen wearing a very formal attire during work hours, long earrings, and properly pulling her light-gray hair back into a bun except for the frontal part of it, which consists of two flat side bangs that fall along the sides of her face.

(Source: Narutopedia)