Meredith Grey's Most Defining Moments on Grey's Anatomy

Meredith and her father, Thatcher, don't share the easiest relationship. When he needs a liver transplant, Lexie asks her big sister to consider donating part of her liver to their father. Mer comes through for Little Grey, referring to Thatcher as "the guy who used to pour my cereal," but also adding that she knows what it's like to have a sister. Her support for Lexie reflects the surgeon's compassion as well as her willingness to do anything for the people she cares about. No matter how dark and twisty she claims to be, Meredith is a loving big sister at heart, and I really love seeing this side of her.