I had a werewolf AU where Replitwo was bought from Xehanort's circus and sent to the sanctuary but I never had a chance to write it. It was just discussions in my personal server and some artwork I shared to Twitter.
Old RP stuff with #vanplitwo#kh Took place a bit in the future. Vanitas became a dark master (good) and Replitwo fell to darkness in the RoD but he got better.
When KH3 came out, people called Repliku (blue eyes) and Replitwo (yellow eyes). For 'nobody dies' KH purposes there's technically two replicas running around/different people.
I'm abount to read the fic you link but I'm a bit rusty on the lore, is there a difference between Repliku and Replitwo?