Souyaku Toaru Majutsu no Index Light Novel Volume 04/Prologue

Characters
By order of appearance:
 * Shirai Kuroko
 * Misaka Mikoto
 * Shokuhou Misaki
 * Dolly (mentioned)
 * Kouzaku Mitori (mentioned)
 * Kamijou Touma
 * Fukiyose Seiri
 * Himegami Aisa
 * Sphynx (mentioned)

New Characters

 * Harvas Spring

Abilities

 * Teleport - Shirai Kuroko, Level 4
 * Mental Out - Shokuhou Misaki, Level 5

Locations

 * Academy City
 * School District 7
 * Heaven Canceller's Hospital

New Locations

 * United States of America
 * California
 * Los Angeles
 * Nevada (mentioned-only)
 * Las Vegas (mentioned-only)

Unanswered Questions

 * Why does the whole population of Los Angeles suddenly disappear?