I'm wondering how Morogh would feel if Dewdrop was a demis*xual and he found out what it was after Dewdrop had already built a strong enough bond with him to be attracted to him in that way
Morogh would be confused at first!
It can be speculated that Morogh is Demi, himself, and uses one's lust towards him as a means to get closer to his prey. And. As a fun reminder: All of Morogh's personal drinks are made with his own tears. Which in turn causes the recipient highly likely to fall in love with him.
However, considering that Dewdrop is demi, those drinks could simply just make them enamored just enough for them to just feel comfortable enough to trust him. Providing they don't ask for more of those special drinks.
Luckily, Morogh isn't the type to push himself onto Dewdrop for any reason unless they say they want anything. He'll show them respect and make sure they are comfortable even if they are tripping out/drunk.
Unless Dewdrop is planned to be a meal, he will play with them. Hunt them down, and eat them. He is a hungry fella, after all