Given the task definition and input, reply with output. 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: At the safari yesterday we were shocked when a lion came up to us. Sentence2: We literally sat in our seats as the lion came over. Sentence3: We were afraid it would bite. Sentence4: Thankfully it didn't bite. Sentence5: It just stood there and we took a photo.
Lion