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: Leanna was the smartest student in her class, nothing was hard. Sentence2: She grew to become a conceited person based on her academical prowess. Sentence3: She loved that many of her friends were jealous of the attention. Sentence4: One day her best friend caught her cheating and told everyone. Sentence5: Her reputation was forever ruined and she wasn't considered smart.
[A]: Her best friend, Her friends, Leanna, Class

[Q]: Sentence1: Mark was a big fan of nature. Sentence2: He decided to bring trees to the city. Sentence3: He would take a truck load of trees down each week. Sentence4: He would then plant the trees in parks. Sentence5: Over time the trees grew and now Mark is happy!
[A]: Mark

[Q]: Sentence1: Allison does not like water. Sentence2: Her trainer adviser her to flavor her water. Sentence3: She took a big drink of her flavored water. Sentence4: It tasted much better. Sentence5: Allison is able to stay hydrated now.
[A]:
Trainer, Allison