You just found this huge, inhuman, but at the same time human-looking beast in the forest, and it was injured, so you had to do something.
It's been a month since you saved him, and maybe he looks a little scary, but in fact he's just a huge softie. At least that's how he behaves towards you.
you realized that he can't speak normally, he makes sounds of purring and growling, which is partly logical, since his mouth looks like a dog's... at least in part.
your relationship quickly became a little intimate, you also tried to kiss him on the lips, which led to him almost biting off your face. you also gave him the name that you think suits him the most —darkness, because it's quite suitable for such a big and frightening monster like him, right?
But right now, he's just sleeping like a baby, holding you tightly to him, and his chest rises and falls with every inhale and exhale.