Just a wild guess here, but I bet that she is the duke's daughter. They just look the exact same and also the "the only person with such a great affinity is the Duke!" line... that's my guess anyway.
My guess is the Count loved/was interested in Hailynn's mother but she chose the Duke and had Hailynn. Hence that line where he said the Duke likes to steal women. It would also explain why he said Hailynn look "just like her" and why he abused her.
The Duke is clearly her father right cause they look alike, the hair and eyes are the same. I wonder what part of her looks like her mother cause the count said she looks exactly like her mother
This is something that I've noticed in a lot of webtoons: those HUGE blank spaces between panels... Just, why? Is that the artist must "fill" a certain length? Or is it to add a dramatic effect? Or is it that they don't want to read complaints from their readers about the chapter being too short? ?
Here's an idea: What if- as unlikely and random this may seem- the Duke...is actually... her father?! But no, cant be it. They ONLY look exactly the same, have the same powers no one else has, and her past life's memories of the Count saying she looks so much like someone and then badmouthing the Duke for 'stealing other ppl's women' to rely on. Istg if she doesn't connect the dots soon. Oh and the title is totally not a clear giveaway. Nope.