His coat is his security blanket.
#How does Misha manage to make Castiel look so small here? #The way he fiddles with his hands #can’t look at his sister #doesn’t want to face this at all. #He wants to be anywhere just not where he is right now. #Looking at the floor for answers #to the side for a way out. #He just wants them all to be happy and to laugh about it later. He wants to go back to how it was. #A family.
Make it a powerful memory, the happiest you can remember,
allow it to fill you up. A full body Patronus is the most difficult
to produce but shield charms can also be equally useful against
a variety of opponents. Just remember, your Patronus can only
protect you as long as you’re focused.