Harry and Ginny were always bonded. So be it through mind, soul or body.
They may not have reaslied. But being the 1st Weasley Girl in 7 generation as a 7th child can include a lot of power.
There demons bound them together. Ever since the chamber. Ever since his first year. They sometimes talk about it to ease the pain. But it can never leave. Unless there together at night.
They both shared the same interests and passions. So compatible.
We all know that Potters get with redheads. Sirius must have had a good laugh about that.
They did almost everything together. But we all know that Potters die together.
So it was no shock, both at the age of 95 passed away together holding hands. One final sentence was uttered to each other.
"Ready for the next great adventure?" and with one nod our 2 lovers went into a long sleep.