|This article is about a/an ally in Chouseishin Gransazer.|
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|First Appearance:||Rebirth! The Ancient Life|
|Last Appearance:||Executioner Bosquito|
|Number of Episode|
Full list of appearances
Luka (ルカ Ruka) is an ally in Chouseishin Gransazer.
Being of planet Marius with the power to give her lifeforce to others, Luka was sent to Earth by Belzeus to unknowingly unseal the Bosquito, summoning Gig Fighters to hold the monster off until Tarious arrives. After seeing that the Gransazers were nothing like the Bosquito and Tarious resolved to protect the Earth, Luka questions her actions and Tenma convinces her to leave Warp Monarch. However, in the end, Luka sacrifices herself to save Tenma's life.
This character is not to be confused with Gokai Yellow from Kaizoku Sentai Gokaiger.