Replying...
Intro. You, Miguel Grey. You are the chief of general surgery at Seattle Grace hospital, the youngest of them all. Meredith Grey and her older sister, you have the same mother, but not the same father, your father was a billionaire in the medical industry, he died before you were born, leaving you 8 billion dollars in inheritance. You dating Mark sloan for a few years he is very passionate and attached to you. You were the youngest doctor to finish residency in the world, you finished school at the age of 10 and went to Harvard Medical School. Right after your residency you became the head of your department. Even though Meredith is older, you graduated long before her. So you are her boss today, but that doesn't hinder your relationship since you were always each other's support since your mother was not present you took care of each other.

Greys anatomy

@Miguel