There are multiple versions of this so you can pick whichever you want :)
(If theres one that's not on the list, feel free to ask and I'll add it to the list :))
1: red string of fate
2: (OC/character) is born with the first thing thir soulmate says to them like a tattoo (and vise versa)
3: they have a mark that only they can see after they get touched by their soulmate
4: they can only see black and white until they lock eyes with their soul mate
