GHKP-62 Doctor Slayer

Haruka Ijuin is usually a doctor, but when treating monsters and evil viruses, she becomes the righteous warrior Doctor Slayer. She meets Ryoko Kashiwagi, an idol infected by the Libra Virus, which can either give power to defeat monsters or strengthen them when it manifests. After saving Ryoko from a monster attack using Counter Attack, a technique that turns pain into energy, Doctor Slayer gains her trust and takes her under protection. However, the monster boss Jaarg is also after Ryoko. After tormenting Ryoko and turning the Libra Virus into a force of evil, Jaarg uses that power to attack Doctor Slayer, who has long been his enemy, and attempts to destroy her body and mind. [BAD END]