Ep 10. Who Is This Bro?

Kamina and Yoko get separated from the rest of Team Dai-Gurren during an attack by the Beastmen. As they try to find their way back, they stumble upon an underground village led by a man claiming to be Kamina's long-lost brother. However, Kamina is skeptical and determined to uncover the truth.

The episode begins with Kamina and Yoko using their Lagann and Gurren mechs to launch a surprise attack on a group of Beastmen. However, the Beastmen quickly retaliate, causing an explosion that separates the two from their comrades. As they try to find their way back, they stumble upon an underground village with a red-haired man standing at the entrance. The man introduces himself as Kamina's brother, who he thought had died long ago. He takes them inside the village, where he shows them around and introduces them to the other villagers.

Kamina is initially taken aback by the man's claims, but he soon begins to believe him after noticing the similarities between them. He begins to bond with the man, who tells him about his past experiences, including how their father raised them both to be warriors. The man also tells Kamina about a secret weapon that could defeat the Beastmen once and for all, which he had been building with the help of the other villagers.

However, Yoko is not convinced about the man's claims and is suspicious of him. She tries to warn Kamina, but he brushes her off and continues to spend time with the man. Yoko then discovers that the villagers have been imprisoned and forced to work on the secret weapon. She tries to convince Kamina that something is wrong, but he is still convinced that the man is his brother.

Meanwhile, Team Dai-Gurren learns that Kamina and Yoko are missing and sets out to find them. They reach the underground village and are surprised to find Kamina's apparent brother. However, Simon becomes suspicious after realizing that the village's location matches the coordinates of a previously detected enemy base. They investigate further and discover that the man is actually a Beastman in disguise.

Kamina is devastated by the revelation and is left feeling betrayed. However, he quickly snaps out of it and realizes that he needs to protect the villagers and stop the Beastmen from using their secret weapon. The team works together to defeat the Beastmen and destroy the secret weapon.

In the end, Kamina and Yoko reflect on their experience and the lessons they learned. Kamina realizes that family is not just about blood relation, but about the bonds you form with the people you care about. The episode ends with the team continuing their journey, strengthened by their experiences.

Overall, "Who Is This Bro?" is a powerful episode that explores themes of betrayal, trust, and family. It is a key episode in the series, showcasing the characters' growth and development as they face new challenges and overcome obstacles together.