Souyaku Toaru Majutsu no Index Light Novel Volume 04/Chapter 2

Characters
By order of appearance:
 * Helcalia Grocery
 * Kamijou Touma
 * Index
 * Othinus
 * Stiyl Magnus
 * Kanzaki Kaori

New Characters

 * Citrinitas

Locations

 * United States of America
 * Los Angeles
 * Cheap Party
 * Large Tourist Hotel #0709
 * Union Station

Cultural References

 * Popper-kun (パッパー君) is likely a parody of the robot.