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: Randy had recently separated from his wife. Sentence2: He felt very lonely and sad all the time. Sentence3: He considered trying to patch things up with Vera, his ex-wife. Sentence4: He decided to get a puppy instead. Sentence5: His decision made him happy and he no longer felt sad.
Randy, Puppy