★ 7.4 TV Series
The Big O
Storyline
Several hundred years in the future, the resources of the Earth runs out, and the progression of the human race has stagnated. The world is now divided into "Units". A boy named Hajiki Sanada lives with his mother and sister in Unit 74, in a place called "Night Town", in which all electricity is shut down at midnight. The key in this story is an object called the GAD. GADs have the ability to reconstruct materials while reacting to feelings of an organic life. The size and shape of the resulting product seem to be different depending on the kinds of feelings that the life possesses. When Hajiki comes in contact with one by accident, it transforms into a huge robot--a Tekkoudo, or "Iron Giant"--which Hajiki names Lightning. And soon he realizes that he isn't the only one with a Tekkoudo, and must find out how to deal with those others who he feels are the "same" as himself. (Source: Anime News Network)
Characters & Japanese Voice Cast
Katana
Main
VA: Junichi Suwabe 
Hajiki Sanada
Main
VA: Kenichi Suzumura 
Arashi Shinozuka
Main
VA: Fumiko Orikasa 
Aiko Mary Harmony
Main
VA: Masayo Kurata 
Takumi Kisaragi
Main
VA: Yuuko Satou 
Catherine Flaubert
Supporting
VA: Kikuko Inoue 
Melissa
Supporting
VA: Chiemi Chiba 
Sayuri
Supporting
VA: Juri Ihata 
Seikai
Supporting
VA: Tomokazu Seki 
Kogoro Hachisuka
Supporting
VA: Unshou Ishizuka Similar Anime
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Frequently Asked Questions
How many episodes does Gad Guard have?
Gad Guard has 26 episodes.
Which studio made Gad Guard?
Gad Guard is produced by GONZO.
Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 18 October 2026, 4:27 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].