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: Tony would often go to the skatepark. Sentence2: His friends would usually meet him there. Sentence3: One day, they forgot to tell him they weren't coming. Sentence4: They all stayed at John's house to play games. Sentence5: Tony skated a lot more without anyone there with him.
Tony, His friends, John