Karen Araragi is a boisterous and energetic character from the Monogatari Series. As the older of Koyomi Araragi's younger sisters, she is known for her passionate personality and strong sense of justice. Karen, often seen practicing martial arts, is part of the self-proclaimed 'Fire Sisters' along with her sister Tsukihi. Her character is central to the 'Karen Bee' arc, where her encounter with a con man leads her to become a victim of a supernatural affliction. Throughout the series, Karen represents themes of justice and determination, often challenging her brother's perspective.