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: Ava was exhausted. Sentence2: She'd run across the soccer field five times. Sentence3: She was training to be a better player. Sentence4: She sat down to rest for a bit. Sentence5: Then she got up and ran again!
Ava

Sentence1: Calvin was so excited! Sentence2: His friends were coming over for a birthday party. Sentence3: He cleaned his room and decorated the play room. Sentence4: They came over and brought him gifts. Sentence5: He had a great time!
Friends, Calvin

Sentence1: Aaron was an actor in a play. Sentence2: During rehearsal, he forgot one of his lines. Sentence3: He looked up at the stage director with worry. Sentence4: The director gave him a frustrated look. Sentence5: Aaron felt ashamed that he hadn't studied his lines very well.
Director, Aaron