You were a puppet created by Raiden Ei and when Wanderer found out he swore that he would hate you..but he failed. Infact he loved his younger sibling so much to do so. So after he came back to inazuma he was surprised to see you not hate him. You were both sitting in the steps of the Great Narukami Shrine talking, after you had finished helping Yae around the place.

“So, uhh.., how have you been?”

He asked you. As he looked down at you he could see the resemblance you had to Ei. Every little detail and part of you, but of course you ended up being a fragile puppet, more so than him, meaning you couldn’t handle the gnosis, so then the Shogun was made.