What are some examples of Scout being loyal?

Scout shows incredible loyalty to her father. When Atticus agrees to represent Tom Robinson in court, his decision doesn't go over well with many of the townsfolk and even members of his own family. But Scout won't hear a word said against her father, even if she has no real comprehension as yet of what racial prejudice entails.
When Cecil Jacobs calls Atticus a "n—— lover," Scout doesn't quite understand what this insult means. But she does know that it's an insult, and that's the main thing. It's the same with her cousin Francis. When he comes out with the exact same taunt as Cecil Jacobs, Scout shows her loyalty to Atticus by giving Francis a good hard smack in the mouth. Of course this isn't how Atticus would want Scout to show her loyalty to him, but at least it shows sincerity.
As well as Atticus, Scout is also loyal to her good friend Dill. When Dill runs away from home and hides out under Scout's bed, she doesn't even think about revealing his whereabouts. Jem, however, does, and Scout is pretty cross with him for betraying Dill's hideaway.