You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Solution: I (myself), Dog
Why? There is only two characters in given story, i.e., I (myself) and dog.

New input: Sentence1: Drake loved to sing songs in the mirror. Sentence2: He hoped that one day he would be a great singer. Sentence3: He practiced really hard, using a hairbrush as a pretend microphone. Sentence4: A video of him was taken by his mum of him doing this. Sentence5: The video went viral and Drake's talent was spotted online.
Solution:
Mum, Drake