She realized all at once that Doon, thin, dark eyed Doon, with his troublesome temper and his terrible brown jacket, and his good heart—- was the person she knew better than anyone now. He was her best friend.–City of Ember–
Doon was touched. Kenny looked like a tiny little wisp, but there was something strong inside him. –People of Sparks–
Now Doon seemed to care for his new friends more than he did for her. Every time she thought about him she felt a thud of pain, like a bruised place inside her.
When someone has been mean to you, why would you want to be good to them?’ ‘You wouldn’t want to. That’s what makes it hard. You do it anyway. Being good is hard. Much harder than being bad.