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: Emily decided that she wanted to try skiing. Sentence2: She had never been before, so she took an experienced friend. Sentence3: They arrived at the resort and rented the proper equipment. Sentence4: Emily began skiing on the beginner's hill. Sentence5: She caught on quickly and spent six hours on the slopes.
Experienced friend, Emily