File:T13 0.jpg

Summary
"The rough for Volume 13's cover. When I drew the rough for the previous cover, I had already decided this one would have Accelerator and Index. The two characters have a symmetry to the ones from Volume 12, the composition is similar to the covers of Volume 12 and Volume 5, and the base color is the reverse of Volume 5's. By the way, while I made the characters in a more deformed style in Volume 12, I went in a different direction for Volume 13. Everyone involved was telling me to go all out since this volume had no comedy whatsoever, so I did some more experimental things here that I had never tried in Index before. (Of course, I did not just do whatever I wanted. I did what I thought would best match the art to the story.)" ―Kiyotaka Haimura