Q: 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: Alex is a selfish man. Sentence2: He is mean to everyone he knows. Sentence3: One day, he meets a girl that is always sweet to him. Sentence4: Alex decides to be nice back to the girl. Sentence5: Now, Alex is dating the girl and is very generous and sweet.
A:
Girl, Alex