After enrolling in Academy City, Mikoto trained hard to become a Level 5 - the highest esper rating. The daughter of businessman Tabigake Misaka and his wife Misuzu, Mikoto was discovered to be a Level 1 Electromaster at a young age. Mikoto Misaka is a major character in the light novel series A Certain Magical Index and the protagonist of A Certain Scientific Railgun written by Kazuma Kamachi with illustrations by Kiyotaka Haimura and published by ASCII Media Works.