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: Jackson was at the lake with his family. Sentence2: He was having a water balloon fight with his little brother. Sentence3: He noticed his brother was distracted. Sentence4: Then, he threw the balloon right at his face. Sentence5: His brother began to cry, and Jackson got into trouble.
A:
Brother, Jackson, Family