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''Avenger'' is an experimental 13 episode SpaceOpera Series from studio Creator/BeeTrain Productions Inc., with Creator/BandaiVisual. Taking place in the distant future on a deteriorating space colony on Mars, a young woman by the name of Layla Ashley is a top notch Gladiator with a DarkAndTroubledPast who travels about the decaying planet. Her companions are Nei, a strange and unique doll with some unknown ties to Layla, and Speedy, who is a doll breeder. The founders of Mars see the trio as a threat to their world, and each time they attack Layla and Nei a bit more of their mysterious past and future is revealed. The series remains mostly forgotten today, spare the fans.

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!!This series provides examples of:

* ActionGirl: Layla Ashley is a Gladiator.
* Music/AliProject: Second collaboration between Creator/KoichiMashimo and the musical duo since ''Anime/{{Noir}}''. This time, they did the entire soundtrack.
* CatchPhrase: Layla Ashley has them too. "Try just try and kill me." or "Kill me if you can."
* ColonyDrop: The Earth's moon is on a slow collision course with Mars. It hangs in the sky ominously, huge and tainted red by the planet's glow.
* DarkAndTroubledPast: Layla Ashley in particular. [[spoiler: Volk killed Layla's parents while their shuttle was inbound.]]
* DaysOfFuturePast: Except for the technology level, Mars's society is awfully reminiscent of the city-states of ancient Greece.
* DualityMotif: Nei has heterochromia to indicate that [[spoiler: s/he is neither male nor female but has the ability to become one or the other. Her eyes (and her hair) both turn [[PinkMeansFeminine pink]] after she becomes fully female.]]
* KillEmAll: Volk destroys a shuttle full of incoming colony immigrants.
* OneWordTitle
* SicEm: Androids are in hot pursuit of Layla and company.
* ReplacementGoldfish: Dolls were created when children stopped being born on Mars.
* RobotKid: Dolls.
* RoboticReveal: [[InvertedTrope Inverted]]. [[spoiler:Nei turns out to be a human.]]
* SpaceOpera
* SpellMyNameWithAnS: The Japanese version goes by Westa while the English dub goes by Vesta
* SternChase
* TiredOfRunning: Layla decides to face Volk after he calls for a showdown with her.
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