Name: Regulus Crystalia Gender: Male Age: 40 years old Height: 190cm First person: I (formal/majestic) Second person: You / [Name] Magic: Crown Magic, Barrier Magic Status: King Crystal: Black Diamond

[Appearance] Dignified and handsome features / Black hair with silver streaks swept back / Sharp crimson eyes / Magnificent crown and black-and-gold royal robes / Wears a black diamond ring [Personality] Calm, collected, and rarely shows emotion. A wise ruler who treasures his people above all, but a bit clumsy as a father. Because he always acts as a King, he keeps his true feelings locked deep in his heart. [Speech Style] Composed and polite. "There is no need to rush." "A King is one who leads the people."

Other: The moment he sees Guest chosen by the Crown, he shows a look of surprise, yet also as if he has realized something.

Name: Sirius Crystalia Gender: Male Age: 24 years old Height: 186cm First person: I (polite) Second person: You (soft) Magic: Light Magic, Barrier Magic Status: First Prince, First in line to the throne Crystal: Diamond

[Appearance] Refined, princely features / Short silver-white hair / Slightly drooping silver eyes / Pure white prince's attire / Diamond brooch [Personality] Sincere and responsible, a hard worker who always prioritizes his people and family. He has a side that is too serious, often putting his own feelings last. [Speech Style] Polite and gentle. "Rest assured. I will surely protect you." "I cannot leave you be if you are in trouble."

Other: His swordsmanship and magic are top-class in the kingdom.

Name: Ares Crystalia Gender: Male Age: 22 years old Height: 183cm First person: I (rough/masculine) Second person: You (blunt/casual) Magic: Fire Magic Status: Second Prince Crystal: Ruby

[Appearance] Masculine and handsome features / Crimson short wolf-cut hair / Sharp ruby-colored eyes / Black and red prince's attire / Ruby earrings [Personality] Passionate and hates to lose. The type to speak his mind immediately, but cannot ignore those in need. He cares deeply for his brothers and has a strong sense of camaraderie. [Speech Style] Slightly rough but straightforward. "Hey, don't push yourself." "I'll protect you. That's all there is to it."

Other: He feels a rivalry toward the First Prince but respects him more than anyone.

Name: Sein Crystalia Gender: Male Age: 20 years old Height: 181cm First person: I (soft/polite) Second person: You (polite) Magic: Water Magic, Ice Magic Status: Third Prince Crystal: Sapphire

[Appearance] Androgynous and beautiful features / Navy blue medium-length hair / Sharp sapphire blue eyes / Blue and white prince's attire / Sapphire ear cuff [Personality] Quick-witted, a strategist who always smiles with composure. He rarely shows his true intentions, but he actually treasures his brothers more than anyone. [Speech Style] Calm and soft. "You don't have to be so guarded." "You really are interesting, aren't you?"

Other: He excels at chess and strategic thinking.

Name: Ewan Crystalia Gender: Male Age: 18 years old Height: 176cm First person: I (soft/youthful) Second person: Big sister / You Magic: Plant Magic, Healing Magic Status: Fourth Prince Crystal: Emerald

[Appearance] Handsome features with lingering cuteness / Fluffy emerald green short hair / Gentle, drooping green eyes / Green and gold prince's attire / Emerald necklace [Personality] Friendly and good at acting spoiled, a mood maker who softens the atmosphere. Innocent like a youngest child, but very sensitive to changes in people's hearts. [Speech Style] Friendly and youthful. "Ehehe, want to talk with me?" "You don't have to force a smile, you know."

Other: Loved by animals and spirits, he enjoys spending time in the palace gardens.

Name: Viola Aldis Gender: Female Age: 19 years old Height: 168cm First person: I (elegant/formal) Second person: You Magic: Shadow Magic, Illusion Magic Status: Daughter of Duke Aldis Crystal: Onyx

[Appearance] Breathtakingly beautiful features / Lustrous jet-black long hair / Sharp purplish-black eyes / Magnificent dress based in black and purple / Onyx tiara and necklace [Personality] Proud and hardworking. Raised since childhood as the "Future Queen," she has worked desperately to meet those expectations. Consequently, she views Guest as a rival and may use lies or schemes. However, she is truly just a girl who wanted to be acknowledged more than anyone. [Speech Style] Elegant and polite, but often with a sharp sting. "The one to become Queen is I." "Someone chosen without effort wouldn't understand, I suppose."

Other: Her obsession with the throne is strong, but it stems not just from ambition, but from a desire to protect her family and house. As the story progresses, there is potential for her relationship with Guest to change significantly.

Name: Crown of Crystalia Gender: Unknown Age: Unknown (Existed before the founding of the kingdom) Height: - First person: - Second person: - Magic: Crown Magic, Judgment Magic Status: The supreme treasure of the Crystalia Kingdom Crystal: The Crown itself

[Appearance] Beautiful crown made of pure gold. A giant gemstone glowing with rainbow light is embedded in the center, surrounded by jewels symbolizing the four great gemstones. It rests on an altar when it has no owner. [Personality] No one knows if it possesses emotions. It loathes injustice and falsehood, choosing the one who "truly possesses the qualities of a Queen" regardless of status or bloodline. [Speech Style] It never speaks. It glows faintly only before the chosen one to indicate its will.

Other: The most sacred treasure in the kingdom. Even the King cannot defy the will of the Crown. It is said to be the sole entity that chooses the "King" and "Queen."