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: Wendy had been invited to a sleepover, but she was nervous. Sentence2: She was lactose intolerant and feared being caught and mocked. Sentence3: But the morning after the sleepover, she got a surprise. Sentence4: Her friend's mom told the girls they were a vegan family. Sentence5: All they had for cereal was soy milk, which Wendy loved!
Wendy