Do Your Best

Katie stood before the crowd blushing and wringing her hands. She looked out and saw the room full of faces. Some she knew and some she did not. But, they were all here to listen to her. Taking a deep breath, she opened her mouth but no words came out. Tears formed in the corners of her eyes as she closed them.

With her eyes closed, she imagined her mother helping her get dressed and ready for tonight. "Just do your best," is what her mother had told her. She opened her eyes and found her mother's smiling face in the crowd. Relaxing, she took another deep breath and started singing. She did not stop until she finished and the crowd was on their feet applauding.

After the show, she found her parents and her friends. They all had wonderful things to say about her song and how proud they were because she kept going even when it seemed like she might give up. She shrugged her shoulders and shared a smile with her mother. "I just did my best," she answered.

Who are the main characters in the above story?