[Comprehensive] 'Good' sister

What would the story be like if some of the characters in the story had a sister?Some of these characters may be male lead, female lead, male supporting role, female supporting role, dragon set, cannon fodder, passer-by... all kinds of random crossings... The story is also called "How to Save You, My Brothers and Sisters" as a big Jinjiang A good Raider at the General Administration, Sera always considers himself a professional. PS: Wear it in each world, there is no CP as a whole, some worlds may have CP~