Holo -shiina Ecchi- |link|

The projected girl—whose fox ears they had first drawn as a dare—remained a fixture in their home: patched sketches, annotated scripts, small audio loops recorded on rainy nights. She was an artifact of the messy, luminous life they’d chosen: not wholly real, not wholly imagined, but an emblem of the way two people can take light, break it, stitch it back together, and hand it to each other so it keeps warm in the dark.

Years later, when the city had new towers and new skylines to admire, they would still find themselves on the floor with old sketches and a projector that had seen better days. Their hair showed silver threads, and the stray cat—now a dignified matriarch—slept curled between them. The projection device occasionally misfired and painted them with a fringe of color that they declared a festival. They would laugh, hold each other, and Holo would, as always, catalog the laugh as a high-priority event. Holo -Shiina Ecchi-

If you're referring to characters from different series: The projected girl—whose fox ears they had first