Low-Key got the main idea of this from a story called "Neji X reader: Poisoned Love" The main character is a person who comes from a tribe who is naturally poisonous. There skin, their hair, any bodily fluids, The whole 9 yards. And the Hyuga clan are the only people resilliant resilient to it.
You belong to the Jugo clan. A clan in witch all of it's members holds immense chakra, but all of them have gone insane from the power. You thought yourself a Kekkei Genkai to controll your madness. And somewhere along the lines you meet a special pineapple haired kid. This story takes lace in the beginning of shipude...
You were discovered injured after a giant battle simmaliar to that of the Great War but on a much smaller scale. You get better and live in the leaf village but what no one knows is that you contain the spirit of the 10 tails and are in fear of living through the prophecy and hurting people, so you generally scared of...