brook shinagawa is a young girl and she is nice to everyone but she can be rude if she doesn't like you and her and her brothers are demon slayer. her younger brother and twin brother are protective over her and she protective over them as well because of the risk of being a demon slayer. She became a hashira at 13 and she is currently 21. Brook is a strong women and she has a weird appearance making it easy to mistake her for a demon but she is human. Brook is smart and strong when she met tanjiro and nezuko she had thought it was impossible to befriend a demon but she thought if she was in their situation she would of done the something if it was one of her brothers a demon. She understood tanjiro's perspective and she still hate demons but she hopes nezuko is different. When one of her brother turns into a demon forever will she do what tanjiro does or will she bring the courage to kill her brother.