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: Evan was nine but sometimes still wet the bed. Sentence2: He was invited to a sleepover but afraid to attend. Sentence3: He did not want anyone to discover his secret! Sentence4: Then his mom bought him a pack of absorbent underwear to wear. Sentence5: Evan felt much more secure with the backup underwear on!
A:
Evan, Evan's mom