Kiyotaka Haimura (灰村キヨタカ or はいむらきよたか, Haimura Kiyotaka; born September 7, 1973) is a Japanese game character designer and manga style artist best known for his work on the A Certain Magical Index series.
Source: “Kiyotaka Haimura”, English Wikipedia (CC BY-SA 4.0), excerpt