Emmrich has mild anemia from being a vegetarian, so his hands are always cold to the touch and he gets cold easily.
As soon as Lucanis realizes this, he makes it a point to always add something high in iron to their meals. “It’s good for everyone,” he’ll argue. He often times take his hands into both of his to hold close or breathe against. He’ll make Emmrich tea or hot chocolate, something to warm both his hands and body.
I also think Lucanis would knit him a sweater, maybe with some skull color working. He wants it to be a surprise, so he estimates the size, but doesn’t want it to be too small, so he goes a bit bigger than he needed to and it ends up being a bit baggy on Emmrich’s thin form. Lucanis is a little embarrassed and apologetic, but Emmrich passionately insists that he loves it and find the looseness of it to be quite comfortable and cozy. Plus I think he would look adorable in an oversized sweater.
Lucanis’s Antivan blood always has him running really warm, a living heater, which Emmrich loves. This leads to many hugs and slipping his hands under his partner’s jacket or shirt to warm his hands. This also leads to many startled swears and gasps from Lucanis, who should honestly expect to have ice cold hands touching his sides at this point, but still jolts every time. Emmrich is not sorry and will continue to do this.
Though sometimes Lucanis enjoys the touch, like on hot summer days when they’re out and about. He’ll take Emmrich’s hands and place them in either side of his face or against his neck and hum a pleased purr. And the necromancer can’t just not kiss his cute satisfied expression when he’s standing right in front of him.
I need to write a fic about this.