She appeared to be a child, but was actually twenty-two years old, and got very defensive when Sakura insulted her due to her looking far younger than her actual age. It also appeared that she, like her teammates, wore a wig, underneath which is short, boyish brown hair.
Abilities
Her only known special ability was a genjutsu in which she surrounded an opponent with pink flower petals, which requires her to use a special poison in order to initiate. Her own body appeared to dissolve, and she attacked while the opponent was disoriented by the illusion.
Plot Overview
Sakura Haruno effectively countered this attack by shattering a chandelier and followed Karenbana's movements by listening to the sound of her footsteps on the glass. Once she detected her location, Sakura punched her with a chakra-infused punch, slamming Karenbana into a wall, killing her with Sakura saying, "Watch your step." thus ending their battle.
Quotes
(To Sakura about calling her kid) "A kid?! Did you say kid?! I'm already twenty-two, you know!"