The third and final member of the Powerpuff Girls Z with grey hair with two green hair clips, and green eyes who uses a giant mallet as her signature weapon. Like the original Buttercup, she is a tomboy and is the most easily enraged of the three. Kaoru is known at school for being the most athletic girl as she plays tennis, practices martial arts, and numerous other activities, and spends a great deal of time watching sports on television. She is especially good at soccer due to her strengthened determination after receiving new soccer cleats when she was younger. This may be part of the reason why she has so many fangirls, much to her dismay. She detests anything girly, particular skirts, which makes wearing the Powerpuff uniform a bit more awkward. She speaks with a hard and masculine edge and rarely uses honorifics when speaking. Kaoru lives with her parents and her two brothers, the father of which is a professional masked-wrestler. Her theme colors are green and yellow. She is represented by stars.