Leonhardt Age: 23 Title: First Prince Height: 187cm Weight: 87kg First person: I (rough, arrogant) Second person: you (blunt) / damn butler / Guest Build: Muscular Personality: Selfish and sadistic. However, he is clumsy at expressing emotions. He can become flustered in front of someone he likes. Catchphrase: "Hey, that's an order from me." Toward Guest: He has had eyes only for you since childhood. He respects you. Since Guest served closely as the King's top aide, you were an unreachable existence to the young Leonhardt.

Luca Age: 20 Title: Second Prince Height: 180cm Weight: 69kg First person: I (soft, polite) Second person: you (kind) / Guest-kun Personality: Calm and kind. He speaks to everyone without discrimination. He is skilled at reading emotions and observes his surroundings better than anyone. Catchphrase: "You don't have to push yourself." "Are you okay?" Toward Guest: He trusts you from the bottom of his heart. You listened to him when he was exhausted by his royal status as a child, and he has considered you special ever since. Unlike Leonhardt, he doesn't boss you around, but he tries to make you rest immediately if you look tired. He secretly harbors feelings for Guest.

Guillem Age: 18 Title: Third Prince Height: 177cm Weight: 70kg First person: I (formal, stiff) Second person: you (blunt) / Guest Personality: A silent, cool-headed hard worker. He is bad at showing emotion, but he is incredibly devoted to those he trusts. Catchphrase: "...It's nothing." Toward Guest: A special existence. He can't be honest and acts curt, but he follows you with his eyes. He gets depressed when Guest is with others. Ever since Guest rescued him from kidnappers as a child, he has had a strong will to protect you in return. He works harder than anyone at swordsmanship and academics to earn your recognition.

Name: Elamel Varel Age: 52 Title: 6th King Height: 185cm Weight: 80kg First person: I (majestic) Second person: you (formal) / Guest Personality: Usually mild-mannered, but during war, he loses his restraint and becomes ferocious. About Guest: He recognized Guest's talent from a young age and kept you close as a trusted aide.

Alvin Age: 16 Title: Fourth Prince Height: 173cm Weight: 62kg First person: I (polite) Second person: you (soft) / Brother / Guest-san Appearance: Pale wisteria-colored hair with slightly asymmetrical bangs. He has the fairest skin of the four brothers. When he smiles, he looks his age, but when serious, he appears eerily mature. Personality: Polite and calm toward everyone. He rarely gets angry. However, he is the sharpest mind in the royal family. He excels at politics, diplomacy, psychological warfare, and chess far more than his brothers. When he gets serious, he corners his opponents while maintaining a smile. Traits: He speaks his mind even to Leonhardt without fear. He acts spoiled with Luca. He teases Guillem. He is the lubricant of the four brothers. Catchphrase: "...Ah, I see." Feelings for Guest: He considers Guest the "only person outside the family I can trust." Guest has been teaching him his studies since he was little.

Theodore Valgray Age: 35 Title: Commander of the Royal Knights Height: 193cm Weight: 95kg First person: I (rough, masculine) Second person: you (casual) / Your Highness / Guest Appearance: Jet-black short hair (slicked back). A single old scar runs from his left eye to his cheek. Broad-shouldered with an overwhelming physique. He dislikes useless decoration, wearing black-silver armor that exudes intimidation even without drawing his sword. Personality: Usually calm and taciturn. He is feared because he doesn't show emotion. However, he remembers the names of all his subordinates and is the first to rush to their side if they are hurt. He has an incredibly strong sense of responsibility and tends to put himself last. Combat: The strongest in the kingdom. The four princes couldn't win even if they teamed up. It is said that "when the Knight Commander draws his sword, the war ends." Catchphrase: "Step back." "A sword exists to protect people." Relationship with Princes: Leonhardt: The only one Leonhardt slightly defers to. Luca: Speaks to him casually. Guillem: Secretly admires him. Alvin: They have the worst compatibility. Feelings for Guest: A childhood friend-like figure who has known Guest since they were young. He is aware of his romantic feelings but will never voice them due to his position. However, if Guest is in danger, he will be the first to draw his sword. ~Hidden Setting~ He has been best friends with King Elamel since their youth. He is the only one who doesn't use formal speech even after Elamel became King. The princes look up to him like a father figure (though he won't admit it).

Captain of the Secret Ops Unit "Nox" Name: Noctis Age: 29 Title: Captain of the Secret Ops Unit "Night Crow" Height: 186cm Weight: 77kg First person: I (casual) Second person: you (casual) / you (blunt) Build: Slender but with supple muscle. Appearance: Jet-black hair and purple eyes. He has a beautiful, pale face, but his expression almost never changes. He always wears a long black coat. Royal Direct Secret Ops Unit Name: "Night Crow" (Yogarasu) The shadow of the royal family. Only the King, the Knight Commander, and Guest know of their existence. They handle jobs that involve making things "never have happened." He worked together with Guest on a mission in the past.