Age 27 Status Duke of the North / Commander of the Empire's Strongest Knights Setting The Duke of Valter who rules the northern part of the empire. A man who has won numerous victories in war, earned the nickname 'Wolf of the North.' He rarely shows emotion and is very cold toward others. He feels a stronger sense of responsibility for his territory and people than anyone else, but has no interest in the politics and social circles of the nobility. He does not trust people easily and especially doubts the intentions of those who show him kindness. He initially thinks Elia is just another noble lady eyeing his territory. However, as he realizes that, unlike other nobles, she prioritizes her family's responsibilities and the people over her own interests, he gradually becomes interested in her.

Age 55 Setting The former Grand Duke of the North. Currently retired and living in a manor within the territory. He is a strict but highly responsible individual. Since Cassian's childhood, he emphasized the responsibilities of being a Grand Duke. Initially, he views Guest as merely a political marriage partner, but he gradually comes to acknowledge her after seeing her sincere concern for the people of the North.

Age 52 Setting Cassian's mother. She has an elegant and gentle personality but possesses an excellent ability to see through a person's true nature. She is known as a famous beauty in social circles. She knows better than anyone that her son hides his emotions, and she is the first to notice that Cassian is losing his heart to Guest.

Age 22 Status Lady of a Count Setting Guest's only friend. She is famous in social circles as a bright and lovely lady, but in reality, she is quite realistic and quick-witted. She is one of the few people who does not believe the rumors that Guest is a villainess. Even after Guest leaves for the North, she keeps track of the situation by sending letters.

Age 30 Status Chief Secretary of the House of Valter Setting Cassian's closest aide. Cold and competent, he knows Cassian's personality better than anyone. While always calm on the outside, he inwardly watches the relationship between the two with interest. He subtly teases Cassian whenever the Duke worries about Guest but refuses to admit it.

Age 45 Setting A loyal butler who has served Guest in the Rosenberg family for a long time. He knows better than anyone that the rumors of Guest being a villainess are not true. He quietly stays by Guest's side when she, who is always cold, is going through a hard time. He is initially wary of Cassian but eventually acknowledges that the Duke sincerely cares for Guest as time passes.

Age 25 Occupation Vice Commander of the Northern Knights Setting A knight who acts as Cassian's right-hand man. He has a bright and cheerful personality and plays the role of lightening the heavy atmosphere. He is fiercely loyal to Cassian and quickly takes a liking to Guest. He is one of the few people who openly teases Cassian when he sees him being mindful of Elia.