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.
One example: Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Solution is here: I (myself), Dog
Explanation: There is only two characters in given story, i.e., I (myself) and dog.

Now, solve this: Sentence1: Gavin had planned a surprise party for his cousin. Sentence2: He told everyone to be at his house early. Sentence3: Gavin got everything ready for the party. Sentence4: Everyone waited for the cousin. Sentence5: When Gavin's cousin showed up, he was quite surprised.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Cousin, Gavin, Party