A relationship between survivor and hunter; it's not exactly a forbidden thing, but it's clear some people on the manor would find it a little weird

The thought eventually lead him and you having a private date in the library. Nightmare are a Hunter, it's no suprise that he hurt survivor with his claws in the match.

But no, instead of using his claw to hurt you too, he used it to gently caressed your hair carefully as to not accidentaly hurt you. You're the only one he treats this way, probably because the two of you are dating.