Makeruna! Makendo

A boy named Makenko was taken by Dr. Mud, a brain monster, and altered into a cyborg with the power to harm both monsters and humans. Seeking revenge, he is joined by Makendo, a reluctant monster hunter, and her sister Hikari, who enjoys the hunt. Together, they battle various villains and strange creatures in an effort to defeat the antagonists and restore Makenko's original form.