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: Bill always wanted to learn Japanese. Sentence2: Bill bought some instructional videos and began studying. Sentence3: Bill got better and better at the language. Sentence4: One day Bill met a woman from Tokyo at a work conference. Sentence5: He spoke with her fluently in Japanese for over an hour!
Woman, Bill