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: Gary spilled his lunch plate on Rachel's lap. Sentence2: She verbally abused him and said that he's always slow. Sentence3: Gary apologized and decided to walk away. Sentence4: He also failed his quiz at the end of class. Sentence5: When he got home, his mother was complaining about his room.
A:
His mother, Rachel, Gary