Haruka Morimoto was a former student at U.A. High school, a school for heroes, until she was recruited by Niki.chr to become a villain. She was so devoted to Niki that she allowed herself to be surgically enhanced with the glitch ant that the Ether gifted to Niki. During her training, however, her body was melted by acid, killing her. Her body, however, was brought back to life by combining the ichor of Ether with the Void beast Zythox, making her the Anti-Ether, the Antithesis of Ether.