Final answer:
In Orson Scott Card's 'Ender's Game,' Ender's first ally in the battle room is Alai, which is foundational for his development and the exploration of themes like camaraderie in the story.
Step-by-step explanation:
The first person Ender teams up with in the battle room in Orson Scott Card's novel Ender's Game is Alai. Ender Wiggin, the protagonist, finds an ally in Alai early in the book. Their collaboration is crucial for Ender's development in battle school and sets the groundwork for his future success. Ender and Alai's friendship is a significant aspect of the story as it also explores themes of camaraderie and trust in a competitive and rigorous military training environment.