Nick Marsh on Grey’s Anatomy is one of the most dynamic and significant characters introduced in recent seasons of the hospital drama. Surgeon Meredith Grey (Ellen Pompeo) has always met with a huge number of patients, by virtue of her job, but not many of them make this kind of lasting impression. After losing her soulmate, Derek Shepherd (Patrick Dempsey), and following her best friends Cristina Yang (Sandra Oh) and Alex Karev (Justin Chambers) moving away, Meredith wasn’t always accepting of new people.

https://screenrant.com/greys-anatomy-nick-marsh-character-explained/