gracerocky but crank the soulmatisms up. why stop at the petrova line being their string of fate? think of the stars dying so they can meet. think of adrian's atmosphere setting the ship on fire just so they can touch. think of the taumoeba leaking just so they can reunite.
think of how the very paths of their lives were made to converge from the very start. it can't be coincidence. a scientist and an engineer, two occupations perfectly poised to cover for each other's weaknesses in their mission to save the stars.
think of how humans have a deeper understanding of theoretical physics while eridians have are more advanced in material science. think of how even their species reflect how grace and rocky are mirrors of each other, two broken halves slotting together perfectly.
think of how xenonite functions perfectly fine in earth's atmosphere, despite the sheer difference from erid's atmosphere. a miracle material that allows both grace and rocky to coexist and eventually touch, like it was created for this specific purpose.
think of how grace's background as a teacher was necessary for him to be able to communicate with rocky. because he's used to explaining concepts in simpler ways to people who have never heard of them before, and he's learned to be very patient with it too.
think of how rocky's isolation drove him to desperate measures, so much so that he would do anything to make this partnership with grace work. because he's always trying to bridge the gap between them, even mimicking grace's mannerisms just to make things easier for him.
think of how neither of them could've done this mission alone. think of how there have been billions of years since the creation of the universe and there are trillions of miles of space between them and yet they still ended up at the right time and place to meet each other.
think of how grace could sit down, and rocky is the right height to be at his eye level. think of how rocky fits perfectly in the space between grace's arms.
think of how they were made to be with each other, in every way, shape, and form. a pair of lovers, ordained by fate and brought together by the cosmos.