How exactly can you call any of the companions "snow flakes"? They have all survived a horrific mind flayer encounter, and have been kicking butt since, esp Astarion, the Lestat expy, who actually managed to ambush you.
Wrong definition of snowflake. You're thinking of the stupid insult a certain class of people use. In this context "special snowflake" is meant to denote that the character in question is super unique and special in a way that feels contrived and over the top.