Detailed Instructions: 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.
Q: Sentence1: Ella was taking her final exam. Sentence2: Suddenly her pen ran out of ink! Sentence3: She raised her hand and told the teacher what had happened. Sentence4: The teacher was able to give her a new pen. Sentence5: Ella was able to finish her exam on time.
A:
The teacher, Ella