Mami Kawada is a former Japanese pop singer and lyricist who was signed to NBCUniversal Entertainment Japan and also a member of I've Sound, a musical group which produces soundtracks for eroge and anime.
Kawada at Bangkok Comic Con in 2014
A Certain Magical Index is a Japanese light novel series written by Kazuma Kamachi and illustrated by Kiyotaka Haimura, which has been published by ASCII Media Works under their Dengeki Bunko imprint since April 2004 in a total of three separate series. The first ran from April 2004 to October 2010, the second from March 2011 to July 2019, and the third from February 2020 to present.
Cover of the first volume featuring Index