Souyaku Toaru Majutsu no Index Light Novel Volume 01/Chapter 1

Characters
By order of appearance:
 * Kamijou Touma
 * Tsukuyomi Komoe
 * Index Librorum Prohibitorum
 * Misaka Mikoto
 * Shirai Kuroko
 * Aogami Pierce
 * Accelerator
 * Yomikawa Aiho

Locations

 * Academy City
 * School District 7
 * Kamijou Residence
 * Tsukuyomi Residence
 * 'Windowless Room'

Trivia

 * “Hydrogen♪ And helium♪” (すいへーりーべー) is a common method for memorizing the in Japan. It's acronym of Hydrogen ("すい"そ), Helium ("ヘ"リウム), Lithium ("リ"チウム), and Beryllium ("ベ"リリウム).