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: Aimee is a nurse. Sentence2: She has to give a toddler an immunization. Sentence3: She pricks the child quickly and delivers the shot smoothly. Sentence4: The toddler cries and reaches for his mother. Sentence5: Aimee hands the child a lollipop and his tears halt abruptly.
A toddler, His mother, Aimee