★ 6.7 TV Series
Super Robot Wars OG: The Inspector
Storyline
After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire. (Source: Anime News Network)
Characters & Japanese Voice Cast
Mizuki Tachibana
Main
VA: Yuu Asakawa 
Klein Sandman
Main
VA: Shou Hayami 
Luna Gusuku
Main
VA: Haruna Ikezawa 
Leele
Main
VA: Houko Kuwashima 
Eina
Main
VA: Mai Nakahara 
Eiji Shigure
Main
VA: Kenichi Suzumura 
Toga Tenkuji
Main
VA: Jun Fukuyama 
Tesera
Supporting
VA: Ai Uchikawa 
Marinia
Supporting
VA: Nana Mizuki 
Tuile
Supporting
VA: Mikako Takahashi 
Raven
Supporting
VA: Hikaru Midorikawa 
Cookie
Supporting
VA: Motoko Kumai Seasons & Related Anime
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Frequently Asked Questions
How many episodes does Gravion Zwei have?
Gravion Zwei has 12 episodes.
Which studio made Gravion Zwei?
Gravion Zwei is produced by GONZO.
Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 18 October 2026, 5:50 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].