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: Kelly felt unprepared for her exam. Sentence2: She was super busy lately and had no time to study. Sentence3: After she took the test she got a terrible grade. Sentence4: Kelly felt horrible. Sentence5: She vowed to study next time.
Kelly