Ep 1. The Castle of the Slumbering Giant God

The show Gravion season 1 episode 1, titled "The Castle of the Slumbering Giant God," follows the story of a group of young pilots known as the Gran Knights, who are tasked with protecting the planet from the Zeravire, an alien race determined to conquer the planet and enslave its inhabitants.

The episode begins with the Gran Knights on a routine patrol when they receive a distress signal from a nearby island. They quickly head over to investigate, only to find that the island is under attack by a powerful Zeravire robot. The Gran Knights spring into action, using their own mechas to engage the enemy and protect the island's inhabitants.

As the battle rages on, the Gran Knights are suddenly ambushed by a second Zeravire robot. They soon discover that this new enemy is much more powerful than the first, and quickly realize that they will need to work together if they hope to defeat it.

With the help of their advanced mechas, the Gran Knights are eventually able to destroy the second robot. However, they soon discover that this was only a distraction, and that the Zeravire had actually been using the opportunity to launch a sneak attack on the nearby city.

Determined to stop the invaders, the Gran Knights set off towards the city, where they face off against the Zeravire's ultimate weapon: a massive, castle-like robot known as the Slumbering Giant God.

Despite the odds against them, the Gran Knights refuse to give up. They use their combined strength and courage to take down the Slumbering Giant God, saving the city and the planet as a whole.

As the episode closes, the Gran Knights return to their base, exhausted but triumphant. They know that there will be many more battles to come, but they are ready and willing to face them head-on, determined to protect their world and the people they care about.