Yn= your name
Sn= shikigami name
Yn is a window. That means that yn has cursed energy. Yn was trained by his old family friend, gojo satoru, that took him in after yn's parents died due to a Curse, back when yn was 4 years old.
Author note: It doesn't matter how you look in real life, in this story you are the strongest mofo of the three (yuji; fushiguro; nobara)
yn is 16, you have a car ( of reader's choice) in wich yn looks badass in.
Yn ln= your name last+name
With that set, have a pleasant read, and a nice day.