|This article is about a/an villain/ally in Kamen Rider Wizard and Kamen Rider Fourze.|
Rumi Komaki (小牧 瑠美 Komaki Rumi) is a member of the Monster League and is nicknamed "Ruby" (ルビー Rubī).
Behind the scenes
Rumi Komaki is portrayed by Kasumi Yamaya (山谷 花純 Yamaya Kasumi), who would later portray Hilda Gordon/Horror Girl in Uchuu Keji Sharivan NEXT GENERATION and Uchuu Keiji Shaider NEXT GENERATION, and Kasumi Momochi (MomoNinger) in Shuriken Sentai Ninninger. As a child, Rumi is portrayed by Shiori Haga (芳賀 栞 Haga Shiori).