Mobile Suit Gundam Twilight AXIS is a light novel published by Sunrise's light novel subsidiary Yatate Bunko and writen by Koujirou Nakamura, with Ark Performance handling story composition and illustration. It got a Net Anime adaptation in June 2017, with music by Takashi Ohmama and Se Jun Kim as the directornote .
A few months after the events of Mobile Suit Gundam Unicorn, two former members of the Principality of Zeon (Arlette Armaju and Danton Haireg, a former weapons developer and a former test pilot respectively), are hired by Mehmet Merka to join a Earth Federation Forces special operations unit called "Mastema" to investigate the shattered Axis outside the Earth's orbit, in order to search for a supposed Psycoframe research laboratory and recover any intelligence if present. However, they are attacked by a Cyber Newtype named Quentin Fermo, who is piloting an upgraded Alex Gundam known as "Tristan".
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Twilight AXIS contains examples of:
- All There in the Manual: The first episode's story is more or less entirely contained in the Youtube description. The short format of the episodes meant that there was no space to actually tell who the characters are, what they're doing, or why.
- Big Damn Heroes: The Byarlant Isolde appears from nowhere at the end of the second episode of the ONA to save the pinned Gundam Tristan from Danton in his Zaku III.
- Call-Forward: Birnam's Jegan is equipped with a proto-shot lancer beam rifle, a reference to the future weapon of the Crossbone Vanguard's mobile suits.
- Care-Bear Stare: Arlette eventually defeats Quentin by using her Newtype powers to basically meld minds with him and make him experience all the love she has for Danton, making him unable to kill them after being exposed to their positive emotions.
- Didn't See That Coming: Birnam didn't think they'd run into any mobile suits on Axis and the appearance of just one manages to rout them, even when they had several mooks and a pair of Ace Customs.
- Interquel: Takes place during the fairly long gap between Unicorn and F91. The story bridges said gap between the early and late Universal Century and ties them together. The antagonists Birnam are a private army belonging to Scharnhorst Buch, father of Meitzer Ronah. Buch's financial endeavors would lay the foundation for the Crossbone Vanguard and Cosmo Babylonia.
- Shout-Out: Birnam's Theme Naming for its mobile suits reference characters from Tristan and Iseult.