so the first thing that came to mind was nsfw so I’ll go with “fuck off” or something like that. and you’ve grown up all your life with those words on your skin. and when you meer haz, you bump into him, and you’ve had a bad day, so you go “watch where you’re fucking going” and he just scoffs out a “fuck off” and then you both look at each other with wide eyes and boom. soul mates. even though he did make you spill your water all over your clothes.
“How’s that line been working for you?”
Though of course if soulmatehood is necessarily reciprocal, that would mean someone has had a cheesy pickup line on their arm since birth and they’d be listening for it with a combination of anticipation and dread.