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: Briana was four wheeling with her friends. Sentence2: She was speeding down a road when she crashed and fell. Sentence3: She landed and although she felt sore she seemed okay. Sentence4: When she checked her helmet she saw a huge crack down the middle. Sentence5: She knew she would have been hurt badly if she hadn't worn it.
Briana, Friends