Apocalyptic Schoolgirl (黙示録女生, Mokushiroku Josei) is an a-class member of the heroes association, and is one of the youngest heroes belonging to the organization. She lived in a small town which was suddenly overcome with a serious outbreak of extremely deadly disease, and was forced to live inside said town for a period of a few months. During this time she developed quite the roster of powers and abilities, evolving in response to the threat of infection and disease, becoming a highly skilled survivalist and marskman, while also developing several supernatural powers as a side effect of being forced to live in such a dangerous place.