A message in Sansa’s dress.
The costumes and dresses in the TV series are skillfully made and perfectly suit the occasions for which they are worn. There is always an implicit meaning to every outfit. For example, Sansa’s clothing has sent very deliberate messages to her allies and her enemies on multiple occasions. Her wedding dress tells us her life story: a trout and a wolf on the belt mean that she was born in House Stark and House Tully. The lion on the back means that she now belongs to House Lannister.