what if Percy had two older siblings who were to run away after a fury attacked them while they were at school, leaving behind their 7 year old Quadruplet siblings and their mom Sally Jackson.
what if Harry wasn't the only child born to James and Lilly potter? read As Harry and his Siblings grow up with The dursleys! This is book 1 there will be seven books each.
What if Ezra has 2 older brothers, 2 older sisters and a twin sister and 3 newborn sisters? we all know that Ezra's parents were arrested by Agent Kallus for speaking out against the Empire,But what if the Empire didn't know That their kids were wandering around Lothal. what if they all went their separate ways? expect Ezra and Kelsey and the triplets.
What if Naruto had a bunch of sisters and brothers who could help guide him in the right direction of becoming a Ninja?What if his sister Chelsea helped him realize that Sakura wasn't the right person for him? What if along the way she falls for Shino Abrame?
What if when Obito surived the Ninja War, He saw Kakashi and Rin happy together. so he goes to the Hidden Sand Village and meets a woman named Sarah who is pregnant with octuplets and one of the girls is named Matsuri and he begins raising the kids as his own kids and they fall in and get married.