Ramsay Bolton, previously known as Ramsay Snow, is a fictional character in the A Song of Ice and Fire series of fantasy novels by American author George R. R. Martin, and its television adaptation Game of Thrones. From Wikipedia
In a recent podcast, D.B. Weiss and David Benioff revealed their preference for Ramsay Bolton's demise over other iconic series deaths, citing it as a balancing act of justice.