|This article is about a/an ally in Chouseishin Gransazer.|
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|First Appearance:||The Beginning of the End|
|Last Appearance:||The Day of Resurrection|
|Number of Episode|
Full list of appearances
Though an agent of Warp Monarch, Ruby intended to stop Belzeus' scheme by heading to Earth to find Ran. Though thought of as an enemy because of Karin's actions, Ruby reveals she's on the Gransazers' side when she saves Ran. Wounded while protecting Ran from Algol, Ruby is taken to the JSDF. Once healed, she helps Ran awaken as the Communicator to become the vessel of communication between Earth and the Warp Monarch high council.