Symbol's for each of my main characters in Miss peregrine's Home for Peculiar Children

My two main characters right now are Jacob and Miss peregrine. My symbol for Jacob would have to be fire. I believe fire is a good symbol for him because he is very determined and it takes a lot to put him out. He keeps burning on even though things look grim. Jacob is so determined to go to the island so he begs and begs and finally gets to go again showing his determination. Jacob also can be dangerous like fire for example when he decides he is going to go to the house by himself was probably not the best idea nor was coming to a strange island he didn't know very well yet. For miss Peregrine I would of course give her a bird as her symbol. Her symbol would be a bird because that's how Jacobs grandfather used to describe her as a bird. Miss Peregrine was also tall and lean which to me makes me think of a birds body. And finally Miss peregrine was quit and in my opinion I think birds can tend to be very quiet at times unless their bothered by people or need to communicate with other birds. What symbols would you give your characters in your book right now? Would it be challenging to think of a symbol for them or easy?