"Fleur, please. I need you."
She cupped Harry's face tenderly.
"Me too. An eternity without you will kill me slowly. But zis is my duty, as a Veela."
The resignation across her face brings on another bout of Harry's tears.
With a final kiss to his cheek she bursts into a stream of light, so bright that Harry needs to cover his eyes. When the light fades and the colors of the world dull, she's nowhere to be found.
Veela are descendants of Chroneia (female Chronus?), the goddess of time. They are her warriors and protectors, tasked on their 19th birthday to weave through time protecting and healing rifts where time, in all it's chaos, is not enough to control for a single goddess.
But Harry, Harry Potter is not just going to let his love gallivant through time without him.