Giratina x Cosmog/Cosmoem/Solgaleo/Lunala OC's+Eevee/Eeveelution! Reader

so basically my OC, Shining Eclipse Star, is a crystal blue and tea green-eyed Cosmog, her brother, Onyx Blackout Star, is a Cosmog with slightly lighter color position swapped eyes as well, and you, my dear reader, are a shiny female Eevee by the name of (Y/N). One day your trainer abandons you in the distortion world and goes back to the real world by himself on the back of his dear Noivern. While exploring the distortion world, you, Onyx, and Shining run into the Renegade Pokémon, the lord of antimatter himself, Giratina, and he cares for the three of you after finding out that your trainer had abandoned you. Occasionally you, Onyx, and Shining will take turns going to the real world to get food from your former trainer's friend Serena, who always has some Pokémon food waiting for you when word reaches her that either you, Onyx, or Shining are in town. By the way, the dashes in the title are simply a placeholder for Cosmoem, since typing Cosmoem twice makes the title too long