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: Ulric enjoys complicated literature. Sentence2: He would often look for books to read that were a challenge. Sentence3: He took a test online regarding understanding more difficult books. Sentence4: He found it to be very easy. Sentence5: By the end, he was the only one that comprehended James Joyce.
James, Ulric