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: Four friends were sitting at a table looking at one banana. Sentence2: They were all equally hungry but obviously there was only 1 banana. Sentence3: They agreed to fight for it, through mathematical competition. Sentence4: They struggled for dominance but in the end one friend one. Sentence5: To his dismay the banana was gone, his brother had eaten it.
A:
His brother, Four friends, One friend