Not enemies, not friends, but brothers – able to live in the same house. (1.16)
“Nowhere in that does it say I have to make friends with children.” (4.75)
"They don't want to teach me everything," Ender said. "I wanted to learn what it was like to have a friend."
Alai nodded soberly. "Always my friend, always the best of my friends," he said. (7.55-56)