You will be given a definition of a task first, then some input of the task.
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: Chris was lonely in his new home. Sentence2: He decided to buy a pet for some company. Sentence3: Chris went to the nearest pet store. Sentence4: Chris felt a fish was perfect company. Sentence5: He finally had company in his new home.
Output:
Chris, Fish