Ghost Girl


 * Maya: A ghost belonging to the Kamisato Faction, often referred to as 'Ghost Girl'.
 * Yuuri Senya: An amnesiac girl, suspected to be a ghost and initially referred to as the 'ghost girl', later revealed to have been an esper with the ability to project an AIM thought being, who appears to Hokaze Junko in Toaru Kagaku no Railgun Gaiden: Astral Buddy.