Quick answer — Motoi Fuyukawa worked on A Certain Scientific Railgun T (Original Character Design), A Certain Scientific Railgun S (Original Character Design), A Certain Scientific Railgun (Original Character Design) and 4 more anime.
Motoi Fuyukawa worked on A Certain Scientific Railgun T (Original Character Design), A Certain Scientific Railgun S (Original Character Design), A Certain Scientific Railgun (Original Character Design), Toaru Kagaku no Railgun: Misaka-san wa Ima Chuumoku no Mato Desukara (Original Character Design), Toaru Kagaku no Railgun: Motto Marutto Railgun (Creator), Toaru Kagaku no Railgun: Entenka no Satsuei Model mo Raku ja Arimasen wa ne. (Creator), Toaru Kagaku no Railgun 4th Season (Original Character Design).