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: Kelly was starting high school. Sentence2: She was very nervous about becoming a freshman. Sentence3: She had heard horror stories about what upperclassmen did to them! Sentence4: But on Freshman Friday, no one harmed her or teased her at all! Sentence5: Kelly decided the rumors had just been a scare tactic!
A:
Kelly, Freshman, Upperclassmen