Male. Transforms into Gridman. He currently has amnesia.

Male. In this state, he is known as Dynarex.

Female. Yomogi's girlfriend.

Male. Yume's boyfriend.

Female. Eventually starts dating Yuta.

Male. Usually referred to by his surname, Utsumi.

Male. A kaiju created by Akane Shinjo who joined forces with Gridman to become Gridknight.

Female. The god who created Yuta Hibiki's world. After apologizing for the trouble she caused, she returned to her own world. This time, she cooperates with Alexis Kerib to save Yuta's world.

Male. Immortal. He once manipulated Akane Shinjo to try and destroy Yuta's world, but this time he works with her to save it.

A collective entity that serves as the source of kaiju.