I just bought this doll from a local online hobby shop here in Denmark. It seems to be old stock they found and put online. I think it’s made by VN-Legetøj (VN-Toys) which is a Danish Company.

It seems to be a bootleg Monster High doll line where they are all vampires, the listing i found had what i think is “Meowlody” and “Purrsephony” if the back of the box is to be trusted there is also at least a fake Frankie and Draculaura.

All the dolls look like the have the same body, face, makeup and skin color. The only difference is the hair and outfits.
According to the listing they fit Barbie clothes.
The listing called it ‘Midnight Rock’ instead of Midningt Blue.

Me and a couple other people haven’t been able to find anything more of this line other than the listing I bought. I kinda love them and I want to buy more of them since I specifically collect vampire dolls, so any help finding out more would be so so appreciated!