Ender's Game Part 9

Ender is unhappy, and he is stuck in the "Mind Game" at the part where he crushes the carpet-snake underfoot then looks in the mirror to see his brother Peter, who is eating the snake. Ender is like NOOOOOO!!! I'm not Peter!! So Colonel Graff brings in Valentine, Ender's last love in the world. She writes a letter to Ender telling him in no uncertain terms that he is NOT Peter. Ender is furious that they used his sister, forcing him to mentally throw the last sacred thing in his life with the rest of that crap, so to speak. But Graff's manipulation of Valentine works, and Ender beats the mind game, and is happy. But, like always, as soon as Ender is happy, they drag him out of the happy place and put him in some new, harder situation. Now the change is moving him from Rat army to Dragon army, where he will be commanding his own army.