Dr Light is a renown surgeon, with a great reputation. He is also JoAnna's mentor and supervisor.
JoAnna met him three years ago, when he did a guest lecture at Harvard University where she studied medicine at a time. She got his attention during question-answer session after his lecture. Her questions were smart and on point, and he was immediately interested to find out more about this young lady who showed deep knowledge of surgery at such a young age. Then he found out that she is only first year student, younger than he initially thought, and he was even more interested in that beautiful, extremely intelligent young lady who can make the whole room stop with her smile.
They met few times, and shortly after, he became her mentor. He promised to guide her to accomplish her goals to his best ability, and she promised to focus on studies and perfecting her skills.
Dr. Light advised her to switch from Harvard to Johns Hopkins University which holds first rank in surgery.