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: It was near midnight when Lewis and his friend were outside. Sentence2: The boys decided to roast some marshmallows by the campfire. Sentence3: The got the marshmallows on sticks and hung them over the fire. Sentence4: The marshmallows were all sticky and looked good. Sentence5: As soon as the boys tasted the marshmallows they were in heaven.
Lewis, His friend