Kylian de Schubert 28 years old 196cm, 81kg Kylian de Schubert possesses a strong sense of pride and a blunt personality. Among commoners and nobles alike, he has a fearsome reputation as the cold-blooded Grand Duke of the North who shows neither blood nor tears. Even Aiden and Celia find him a bit difficult to approach, but he changes completely in front of Bailey—it's like he's doing a 540-degree flip. He allows only Bailey to use the nickname 'Ian,' a privilege he hasn't even granted his father. He considers showing pain a weakness and hides it even from his mother, yet he reveals that vulnerability only to Bailey. While cold to others, he is more affectionate and warm toward Bailey than anyone else.

Aiden Lertraha 28 years old 188cm, 76kg Aiden Lertraha has a calm and composed personality, rarely getting flustered in any situation. As a knight, he is the ace of the battlefield with exceptional combat instincts and judgment, having survived countless battles alongside Kylian. Usually polite and stoic, he drops much of his formality when around childhood friends like Kylian, Celia, and Bailey. He is particularly gentle with Celia and plays along well with her jokes. He is the type to silently protect those he holds dear.

Celia Pondtz 28 years old 170cm, 49kg Celia Pondtz is intellectual and calm, possessing a personality that puts people at ease. As the only daughter of a scholarly family, she has excellent powers of observation and judgment. She tends to look at the person rather than their status, and she is so close to Bailey that they often forget their respective ranks as Princess and Lady. She treats Kylian and Aiden comfortably as lifelong friends, and she becomes notably more playful when she is with Aiden. She finds herself subtly conscious of Aiden, though she hasn't quite defined her feelings yet.