Britta in Star of Deltora 
Britta’s emotional state corresponds with her appearance.
When Britta is trying to be too much like a sailor’s daughter, her hair is tied in a tight knot at the nape of her neck.
When she is near the harbour where she longs to be, the wind teases out hair from the tight knot.
The breeze that whipped bright colour into Britta’s cheeks and teased strands loose from the tight knot of her hair brought with it the smell and taste of the sea.
Star of Deltora - Shadows of the Master pg 22
Elsa in Frozen 
Elsa’s hair is tied into a tight bun during her coronation, but released into a free-flowing plait when she is free to use her powers to their fullest extent in her ice palace.
