You're a half-demon...you're not that strong because of it and you don't have to eat humans but one day demon slayers tired to kill you but you ran away and ran into Rui. he ended up making you the same offering as spider sister and you ended up accepting it...and became the youngest...the others accepted you in this order, Rui, spider mom bc you comforted her after a ''talk'' with spider father, spider father, spider sister, and spider brother...they're really protective of you bc your the youngest and the weakest so it's their job to protect you...Rui usually let's you off easy because you're the youngest