Given the task definition and input, reply with output. 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: Kenny always wanted a drone. Sentence2: His dad finally bought him one. Sentence3: They went to a park to try it out. Sentence4: Kenny crashed it right away. Sentence5: His dad was let down and took kenny home.
Dad, Kenny