Responses
Here ya go...
(a small *spoiler* about the character "Damien")
Damien/Demian/Damian is the duke's son. He is 8 years old and currently at boarding school. He doesn't come into the story until the couple has been married for a few months. And he is just the cutest little lion cub ever. If the manga can get across half of his character you will probably still love him.
For reference:
https://i.pinimg.com/originals/a1/3d/8d/a13d8d9b1d9e7f436f6cc707418b351d.jpg
And here's the novel if you are dying to know more:
https://www.novelupdates.com/series/lucia/?pg=16
saw the name “Damian” in the comments,,what’s his role in the story?