In the beginning of the story "Crash," Crash bullies his neighbor, Penn Webb, and gets angry at Jane Forbes, who he has a crush on. Towards the end of the story, he stands up to Mike, a person who used to be his friend at the beginning. He does this by defending Penn from Mike's bullying ,and even thinks aloud about whether the name “Crash” fits him anymore, since he’s started to be much kinder.
Based on the summary above, in the begging Crash teases Penn, but in the end he is