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: Lauren was cleaning out a closet and found a small box. Sentence2: The box was empty and it was purple. Sentence3: Purple was her favorite color so she asked to keep it. Sentence4: Her mother told her she could have it and use it. Sentence5: She put her favorite keepsakes in it and cherished it always.
Lauren, Mother