"I always behave!" She pointed out indignantly. Just sometimes she behaves well, and sometimes, less well. But logically speaking, the denotation on behaving read simply as 'act or conduct oneself in a specified way, especially toward others', which she was always doing, regardless of how Trance felt of the specified way she was conducting herself.

She absolutely refused to be persecuted for behaving like a Spark. She IS a Spark. And No one, not Trance, and not Othar, was going to make her feel like she was a bad person because of it.