How we cite our quotes:
In danger? thought Coraline to herself. It sounded exciting. It didn't sound like a bad thing. Not really. (2.83)
The "not really" at the end of this thought emphasizes the doubts Coraline has. She may be brave, but she's still scared. That's the whole point.
Coraline went through the door.
She wondered what the empty flat would be like – if that was where the corridor led. (3.35-6)
Coraline is a little concerned here, but since she wants to go through the door, we're not sure we'd call this courage. Maybe just reckless.
"It wasn't brave because he wasn't scared; it was the only thing he could do. But going back again to get his glasses, when he knew the wasps were there, when he was really scared. That was brave." (5.75)
Coraline makes her dad's story about the wasps seem downright epic. And hey, courage is a central theme in epic stories, so that makes sense.