My hub, 6'3", nice guy, handsome.

It could be either gender, any race or age. I don't think soulmate implies sexual attraction- or do I misunderstand the term?

Its how how he or she looks, its how he or she feels. That's a soulmate.

He must be invisible

my wife.

my shadow that follows me/each others, shadows, no matter where we are, or whom we're with, knowing they are yours at the end...
aaaaand also yummm

an average bloke to the world but the world to me.

Human, hopefully
I don’t want an alien soulmate 😱

Just like the guy I married ! 🤓

An average person.