Norio Matsui

Norio Matsui is a member of the Touto Institute of Advanced Matter Physics who is secretly a member of Faust and a supporting character in Kamen Rider Build.

History
Alongside Yoshikazu Takahashi, Norio Matsui was assigned by Gentoku Himuro to serve as an assistant to Takumi Katsuragi after Gentoku invited the scientist to continue his research unsanctioned. Later, as Gentoku transformed into Night Rogue and announces the formation Faust to scientists he gathered, Matsui was one of the scientists cheering.

Matsui and Takahashi later resurfaced after Faust was moved from Touto to Hokuto to rescue Gentoku Himuro after he was knocked out and presumed dead following a beating from three other inmates. Upon waking up, Gentoku hugged his two old comrades and told them he was eternally in their debt.