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: Gina lied and told her mother she left her phone in her locker. Sentence2: In reality it had been confiscated by a teacher. Sentence3: She laughed and pretended to be lighthearted. Sentence4: She walked calmly to her room and closed the door. Sentence5: She jumped on her bed as her heart pounded in her ears.
Gina, Teacher, Mother