Q: 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: Maria introduced herself to me. Sentence2: I tried to exchange some information about me to let her know me more. Sentence3: She seemed great, until she complained about her ex-boyfriend. Sentence4: She couldn't stop complaining about his infidelity. Sentence5: After the date, I choose not to talk to her in the future.
A:
I (myself), Ex-boyfriend, Maria