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: There was a potluck at Kim's job. Sentence2: A friend brought fried plantain. Sentence3: Kim had never had any, but it looked savory. Sentence4: She bit into the plantain and was surprised it was still sweet. Sentence5: Kim liked it so much she had another serving.
Friend, Kim