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: Gina's crush had been absent from school. Sentence2: Gina had no way of knowing where he was. Sentence3: Gina was getting worried. Sentence4: Missing one day of school wasn't unusual. Sentence5: But three days had Gina worried.
Gina's crush, School, Gina