So idk if I'm right or wrong on this (chances are that I'm wrong but the name "Izanagi" (clearly Japanese) is recorded in something called a "Kojiki" and in ther Kojiki, it is translated into "He who invites" and since Excalibur is one of the starting frames he kinda invites you to the game. Also this Izanagi had a younger sister called Izanami. And Nyx happens to look EXACTLY like Excalibur but like a female version. Weird thing is that Izanami also was his wife or something? I'm getting my info from Wikipedia so idk if it's accurate or not. Izanagi also had a sword called "Totsuka-no-Tsurugi" or "Sword of Lenght of Tne Fists". I can, again, only assume. And sorry for typing up an entire friggin essay xD