"Graff"

Another conversation between the two unknown men, this time saying how Ender's love for his sister Valentine might keep him from leaving with one of the men, and that one of them was going to get Ender. A man from the International Fleet came to Ender's door, and asked Ender about the fight with Stilson. After hearing his explanation, the man revealed that he was Colonel Graff, and that he came to offer Ender a chance to join the Battle School in the Belt. He says that the I.F. allowed him to be born, and was I.F. property, but he wants Ender to choose because if doesn't want to then he won't do well. Graff tells Ender he desperately needs him, and Ender agrees to go, because he feels like he has nothing to lose. The last thing he heard as he left was Valentine telling him to come back.

While I was reading, Graff showed he was desperate for Ender, and showed that he was essential to their plan of destroying the buggers. Valentine shows she is the only one who truly cares about Ender by being the only one to say goodbye and be heartbroken about him leaving.