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: My sister is moving into a new apartment. Sentence2: She asked me to help her with the move. Sentence3: That's when I realized how grossly out of shape I am. Sentence4: While moving the sofa to the house, I almost passed out. Sentence5: She had the nerve to laugh at me before giving me water.
I (myself), My sister