watch 01:38 The Loop (TV) Do you like this video? This article is about a/an actor in Kamen Rider Build. Rena Matsui (松井玲奈, Matsui Rena) is a J-Drama actress and former member of the idol group SKE48. She portrayed Ryoka Saiga in Kamen Rider Build: Be The One. External links https://ja.wikipedia.org/wiki/松井玲奈 Rena Matsui at the J-Drama Wiki Twitter Instagram Retrieved from "https://kamenrider.fandom.com/wiki/Rena_Matsui?oldid=540959" Categories: Kamen Rider Build Actors who appeared in J Drama Community content is available under CC-BY-SA unless otherwise noted.