The original image is Lux with Yoruka, but using my subpar skills, I edited the image (Pardon my mid editing skills).

For more context, here's her anime counterpart

We'll be going with the LN version of Queen Raffi cause I dunno why they made the anime Queen Raffi like how they did 💀

The image is not mine, but I have re-edited it to how the mc looks. So the image below is how the mc looks. (He's basically Lux but with a more emotionless pitch black eyes).

As for harem, I haven't decided, because I haven't thought of harem yet. As for the girl on the cover, short answer: Yes.