Ep 13. Eat Up, Everyone

Simon, Kamina, and the rest of Team Dai-Gurren are still reeling from the last battle, which saw the death of one of their closest friends. Yoko, in particular, is struggling with her grief and frustration, feeling helpless as she watches her allies risk their lives in the seemingly endless war against the Beastmen.

In the midst of this emotional turmoil, the team receives a message from an unexpected source: Nia, the mysterious girl who appeared on the deck of the Dai-Gurren during the last battle. She requests to meet with Simon, and he agrees to go alone to hear what she has to say.

When Simon arrives, he is surprised to find that Nia has prepared a sumptuous feast for him. As they eat, she reveals that she is actually the daughter of the chief of the Anti-Spiral race, the sentient beings responsible for creating the universe as it is. The Anti-Spirals have been locked in a never-ending battle with the Spiral beings (of which Team Dai-Gurren are a part), who represent the forces of evolution and expansion.

Nia explains that the Anti-Spirals are determined to prevent the Spiral beings from reaching the level of power that would allow them to destroy the universe. To that end, they have been using the Beastmen as pawns in their war, hoping that they will be able to defeat the Spiral warriors. However, Nia has grown disillusioned with her own people and wants to find a way to end the conflict peacefully.

Simon is skeptical, but Nia proves her sincerity by revealing a shocking secret: Simon himself is actually a "Messenger from the Heavens," a being chosen by the universe itself to rise up and become its protector. As a member of the Spiral race, Simon has been imbued with an immense power that has yet to be fully unlocked.

Nia offers to help Simon unlock his true potential, but warns him that doing so will come with a heavy price. Simon must be willing to forgo his emotions and become a cold, calculating warrior if he is to succeed in his mission.

Back on the Dai-Gurren, Yoko and the others are trying to cope with Simon's absence. When he finally returns, he is a changed man: calm, focused, and seemingly devoid of any emotion. He informs the team that Nia will be joining them, and that they should prepare for a massive battle.

As the episode draws to a close, Team Dai-Gurren prepares to face off against the Anti-Spiral forces. Simon seems more powerful than ever before, but Yoko and the others can't help but feel that something is off. Is Simon really willing to pay the price required to become a Messenger from the Heavens? And what exactly is Nia's role in all of this? All will be revealed in the next exciting episode of Tengen Toppa Gurren Lagann!