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: Leo was on a safari in Kenya. Sentence2: He saw no animals at all! Sentence3: But then his guides called his attention. Sentence4: Leo looked and saw three lions approaching! Sentence5: They got almost close enough to touch!
Three lions, Guides, Leo