Humans (and humanoids) are known for having soulmates, both platonic and romantic. They get the first words their soulmates will say to them written somewhere on their body but won't know if that soulmate is platonic or romantic until they actually hear the world. Once the words are spoken, the words change into the soulmate's name.

I'll take anything with a focus on either the original trio, prequel trio or the new trio being linked as soulmates (platonically or romantically).

Just no incest (if you decide to write han/luke/leia then luke and leia should have a platonic relationship only please).