How does Graff isolate Ender during the launch?

Graff isolates Ender during the launch by deliberately placing him apart from the other recruits and manipulating their perceptions of him. He praises Ender’s abilities while simultaneously downplaying the other children, fostering a sense of jealousy and animosity among them. This tactic is intended to make Ender more self-reliant and to prepare him for the challenges he will face, reinforcing the idea that he must succeed on his own. By creating an environment where Ender is both admired and ostracized, Graff aims to strengthen his leadership skills and resilience.