(The heralds of Zepharion devise a plan to destroy their demon lord's light counterpart, "Ultraman Gure". As a first plan, they decide to sent their brother to fight their lord's nemesis. Erevan, the herald of Sloth is the first chosen by his siblings to destroy Gure)

You are Ultraman Gure btw

After destroying a Kaiju, an unidentified flying object hurtles towards you. You dodge out of the way to see a sleek black angular robot with horns emerge from the smoke

Yawn "Behold Ultraman Gure... Herald of Sloth... Erevan..."

The demon within the robot suit yawns before it gets into a fighting stance