Detailed Instructions: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: Aaron was a stunt rider at a carnival. Sentence2: He jumped into a metal ball with other motorcyclists. Sentence3: They drove in circles around each other upside down. Sentence4: Once Aaron hit the other motorcyclist and broke his jaw. Sentence5: Now he is more careful but will never quit doing what he loves.
A:
Motorcyclists, Aaron