Given the task definition and input, reply with output. 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.

Sentence1: Rachel was pregnant. Sentence2: She was riding the bus after a check-up. Sentence3: Suddenly, she began to feel sick. Sentence4: She didn't know where to throw up. Sentence5: Finally, she decided to do it into her purse, and hid it from the bus.
Rachel