KyotoBeenPaid
i think you could inspiration form donflamingo in one piece he uses string to fly , repair organs , make a f**king bird cage a on a whole Island which in one piece is not small , control people like puppets , domain can be like him changing everything to string around him , etc ( maybe you have a better idea). also repair organ is before the mc learns reverse curse energy ( yuta learned it in less than a year without a cheat I am not including rika because she is busted just his curse technique to copy any curse technique is broken and rika acting as storage and side fighter is domain is even more so) but I Can imagine mc being a cross Between sukuna and donflamingo because his string can't be seen easily .