She had to prove to herself she wasn't boring. She had to prove she wasn't just a bookworm. She had to prove her future wasn't depressing. Looking at where she lived, she saw the pictures and read the articles. She met with Overwatch. She became a doctor. She was head of surgery in a hospital! She left to join Overwatch! She worked with them and was even given medals! But like all good things, Overwatch had to come to an end. There were scandals and secret organizations and deaths. There was even a special act in place so the team wouldn't form again.
So she somehow decided to move here and lived alone. Wow, that wasn't depressing at all.