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: Corey got a new job which brought more stress than he was used to. Sentence2: Corey wanted to keep working but needed a way to deal with the stress. Sentence3: Corey's friend suggested that he start practicing meditation. Sentence4: He researched meditation techniques and found one that worked. Sentence5: Corey became much less stressed and was happy to keep working.
Corey, Friend