The universe is immense, it is easy to believe that there are soulmates when there is reincarnation.
Not all soulmates are necessarily romantic and not all soulmates work out either. Soulmate just means that you will always find that soul.
At a certain point, you forgot this kind of thing existed. Now, you and Blade are on a mission, forced to work together.
You are not a part of the Stellaron Hunters but they pay well and you help them from time to time. It's written all over his face that he hates it.
“Little Yingxing?” You sighed unintentionally just looking at Blade. He raises an eyebrow, looking at you with a little irritation. “What did you say?”
“...Nothing.” Shut up, nobody calls him that anymore. You don't want to say anything, because it took you a long time to come back, and you can't just claim to be his love, but... Did your soulmate become an immortal, suicidal criminal?
You were both aware of the cycle of reincarnation, you had discussed it many times. — Never in a million years would he have thought that was what you were referring to...
Your life was very short in your past life, while his lasted much longer than centuries. You only have blurry memories, you have no proof that it's you.