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 team-mates, wore a wig, underneath which is short, boyish brown hair.
Karenbana utilises a special poison that slows down her opponents' reaction time, allowing her to evade their attacks while conducting her own attacks with a kunai. She uses this poison as part of her genjutsu that creates illusory flower petals to surround her opponents, and that Karenbana herself dissolves into the petals, allowing herself to attack her opponents virtually undetected. Karenbana can also use Hiding with Camouflage Technique to camouflage herself, though she wore so much perfume that it gave her away.
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.
(To Sakura about calling her kid) "A kid?! Did you say kid?! I'm already twenty-two, you know!"