Just some clarification on certain aspects of the fic: Arashi is the Head of the Uzumaki clan and the next in line to be the Uzukage of Uzushiogakure. He is Minato's husband, and Minato was going to go to Uzu and give up the Hokage title to Tsunade. Naruto is Arashi and Minato's child, while the other children are Naruto's half-siblings. Kushina is Arashi's sister, who has always wanted to be the clan head and loves Minato. However, one small issue with her plan is that her older brother and younger brother, Arashi and Kushina, have a younger brother named Shoto, who doesn't know that Naruto was even born. Kushina conspired with Danzo to trap Arashi. As for the sword thing, it's going to lead them to Sumiyoshi, who will teach Naruto about youkai. The whole sword legend all fear the three thing is just something Shin used to mess around with, and the dragon thing is a hint to Arashi, who is the holder of Seiryu, the Blue Dragon, just like the jinchuuriki. The four guardian beasts have containers called Holders. Also, in the Leaf and in Uzu, not everyone is so keen on homosexuality, so be mindful. There may be some extra crossover stuff I was thinking of having Naruto and Inuyasha and the others live in Uzu, then Naruto becomes Hokage, and he and Inuyasha adopt Harry Potter.
Arashi was nineteen when he and Minato got married, and he's immortal now thanks to Shin, so he's still technically physically nineteen. He was sealed in a time paralysis seal, so he's still nineteen.
Arashi and Minato will have more kids as the fic progresses.