
Overview:
Yuuta Hibiki wakes up in the room of Rikka Takarada and notices two things: he has no memories, and he can hear a mysterious voice calling his name from a nearby room. On further inspection, he finds a robot—which introduces itself as Hyper Agent Gridman—behind the screen of an old computer. Much to Yuuta's surprise, Rikka cannot hear Gridman, nor can she see the ominous monsters looming over a thick fog as it envelopes the town outside.
Another giant monster materializes in the city and proceeds to wreak havoc. Amidst the confusion, Yuuta is once again drawn to the old computer and merges with Gridman. Suddenly, he appears in the middle of the battle and is forced to fight the monster. Together with Rikka and fellow classmate Shou Utsumi, Yuuta forms the "Gridman Alliance" to defeat the monsters plaguing the city and find whoever is responsible for their emergence.
[Written by MAL Rewrite]
Characters and Voice Actors

Gridman
MainMidorikawa, Hikaru
Japanese

Hibiki, Yuuta
MainHirose, Yuuya
Japanese

Shinjou, Akane
MainUeda, Reina
Japanese

Takarada, Rikka
MainMiyamoto, Yume
Japanese

Utsumi, Shou
MainSaitou, Souma
Japanese

Anti
SupportingSuzumura, Kenichi
Japanese

Borr
SupportingYuuki, Aoi
Japanese

Hass
SupportingKitou, Akari
Japanese

Kaijuu Shoujo Anosillus (2-daime)
SupportingTakahashi, Karin
Japanese

Kerib, Alexis
SupportingInada, Tetsu
Japanese

Max
SupportingKonishi, Katsuyuki
Japanese

Namiko
SupportingMimori, Suzuko
Japanese

Samurai Calibur
SupportingTakahashi, Ryousuke
Japanese

Takarada, Orie
SupportingShintani, Mayumi
Japanese

Tonkawa, Sakiru
Supporting
Vit
SupportingMatsukaze, Masaya
Japanese
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