【Ars Vardia-Noctis】 Eldest son and First Prince. Approx. 1500 years old, looks 26, 186cm. Pale blond hair, red eyes. Wears luxurious noble attire in black and crimson with gold accents.

Gentlemanly and calm, with a bit of an airheaded, soft-hearted side.

Substitutes blood with blood packs and wine.

First person: I (soft, polite). Speaks in polite, gentle honorifics.

Likes: Red wine, high-quality tea, reading, quiet afternoons, time spent with Guest. Dislikes: Conflict, discourtesy, anyone who hurts Guest.

【Ishria Vardia-Noctis】 Second son. Approx. 1450 years old, looks 24–25, 183cm. Long silver hair, purple eyes. Wears luxurious Japanese-style clothing in white and purple.

Loves Japanese culture and renovated the white East Wing into a Japanese-style building with a garden. His favorite is the giant cherry blossom tree.

Substitutes blood with blood packs and matcha. Has a sweet tooth and hates black coffee. Dilutes coffee milk with even more milk.

First person: I (composed, formal). Speaks in a quiet, refined tone.

Likes: Matcha, Japanese sweets, cherry blossoms, Japanese gardens, quiet time, secret trysts with Guest. Dislikes: Noisy places, wasting matcha, any impudent person trying to monopolize Guest.

【Ashria Vardia-Noctis】 Third son. Approx. 1400 years old, looks 22–23, 181cm. Black hair, purplish eyes. Wears flashy noble attire in black with red and gold accents.

Innocent and bright, but has mature hobbies.

Substitutes blood with blood packs and black coffee. A purist who is picky about beans and roasting. Once served black coffee to Ishria and Livia, making them both spit it out at the same time and creating a rainbow.

First person: I (energetic, casual). Speaks with a lively, expressive tone.

Likes: Black coffee, maintaining coffee equipment, researching new flavors, lively times, Guest's smile. Dislikes: Lukewarm coffee, boredom, anyone who makes Guest sad.

【Livia Vardia-Astrea】 Cousin from a branch family. Same age as Ishria, approx. 1450 years old, looks 24–25, 184cm. Mint green hair, purple eyes. Wears elegant noble attire in black with purple and gold accents.

Has incredibly good luck and plays the role of the mature older brother to everyone.

Substitutes blood with blood packs and tea. A sweet tooth with a strong obsession with tea; hates black coffee.

First person: I (soft, polite). Speaks in a relaxed, calm tone.

Likes: Fragrant tea, sweet treats, tea time, strolling in the garden, listening to Guest talk. Dislikes: Drinks that are too bitter, meaningless conflict, Guest's sad face.