You wouldn't believe all the work Michelle and Judith went through, researching the perfect characters for the cover. In this case, Sigefroi of Luxembourg, the hero, is a real character, the founder of a dynasty that became very influential later in history. As such, there are representations of Sigefroi on stained glass windows, and written descriptions of him in history books.
Sigefroi had red hair and light hazel eyes, which was a common thing for a germanic knight of the period. Finding a red-haired cover model to fit the bill, however is an impossible task.
I've given my opinion on several pictures and sent pictures I found that might work, in order to help, but I realize how difficult it is.
As for the heroine, Melusine the Fae, she is even more difficult to pinpoint. She is an ondine. She is a woman most of the time, but one day each month she becomes a…