Gridman Sigma

Gridman Sigma (グリッドマンシグマ, Guriddoman Shiguma) was the proposed ally of Gridman in a sequel series that was never completed or even aired. Sigma would have become the alter ego of Takeshi Todo, a reformed antagonist of the original series. Sigma would have fought a relative of Khan Digifier.

In 2015 Gridman Sigma made his first public appearance in the anime short, Denkou Chojin Gridman: Boys-invent-great hero where he is finally partnered with Takeshi Todo.

Denkou Chojin Gridman: Boys-invent-great hero
Takeshi appear as an adult in the anime Gridman short. After watching the battles of the previous Gridman, Takeshi is granted a transformation device by the light of several monitors and transforms by shouting 'ACCESS FLASH'. Transforming into Gridman Sigma to face two monsters in the real world.

Profile

 * Height: micro ~ 70 m
 * Weight: 0 ~ 56,000 t
 * Flight speed: Mach 30
 * Origin: Hyper World

Power​s
Unknown

Trivia

 * Sigma's blue design would be later used in many other Ultras.
 * His face resembles the faces of Jean-Bot and Jean-Nine.
 * The reason he has no history or stats is because he never made it on screen since his series was cancelled before development could be made on the character.