Chapter 14 of Toaru Kagaku no Railgun Gaiden: Astral Buddy was released on September 27th 2018.
- Flashback chapter exploring Mitsuari Ayu's past.
By order of appearance:
- Unnamed diverting people's perception esper ability - Unnamed girl
- When Iruka and Ayu were trying to escape the facility to the roof, Kuriba Ryouko is seen briefly in a hallway alongside an older woman presumably her mother.
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