Story
A, who's now an immortal who has some knowledge of the worlds beyond their world (via their past as a former god and interacting with the Immortal Squad), gets duplicated into two characters.
One continues their life as A, an immortal living in Sacred Earth. One continues their life as Vein, the new god, and a part of the experimental gods.
Relationships
A
"...How much am I going to change, if I were to stay?."
It's their other self. Is Vein the original? Is A the original? It doesn't matter anymore—now that the two of them live their lives independently from each other. The question about whether they can be considered the same person doesn't matter anymore, if they've grown and changed into two distinct people.
But nevertheless, Vein feels an emotional connection+attachment towards A. Will punch God of Creation in the face if they put A through more things.