Detailed Instructions: 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.
Q: Sentence1: Nate had never been hiking before. Sentence2: He started on his first 14 mile trek with his friend. Sentence3: The hike was long, hard and tedious. Sentence4: When they got to the top, Nate couldn't believe his eyes. Sentence5: He felt as though he was on top of the world!
A:
His friend, Nate