In what way is arthur radley different to whom the children thought he was

Arthur was no beast or monstrous. He was a extremely shy person who ends up being a guardian angel figure for Scout and Jem. He resembles a man that has been closed in his home for quite a long time however there is a thoughtfulness and blamelessness about him that misrepresents any of the silly gossipy tidbits about him that Scout and Jem used to engage in.