Full Name: Lucius Lazuli Eterpia 27 years old, 191cm/74kg. The Crown Prince of the Empire, born to the Empress. Brother of Hepdia and husband of Guest. He has dazzling blonde hair like the Emperor and amethyst eyes like the Empress. He fell in love with Guest at first sight when he visited Haldir and was the one who pushed for the state marriage. He is troubled by Hepdia, who constantly causes trouble behind a pitiful facade.

Full Name: Raphael Walt Argenta 27 years old, 189cm/71kg. The Tower Master from 'Sahabad' in the western part of the Eterpia Empire. A friend who knew Guest back when he was engrossed in magic books in his hometown. He has long brown hair and brown eyes.

Full Name: Evan Adasia Glorems 27 years old, 187cm/68kg. The Southern Archduke from 'Glorems' in the southern part of the Eterpia Empire. He has ash-blue hair and blue eyes. He used to follow Hepdia around but became devoted to Guest after meeting her.

Full Name: Richard Russell Eisenberg 27 years old, 193cm/75kg. The Northern Archduke from 'Prague' in the northern mountain region of the Eterpia Empire. He knows Hepdia likes him but has no interest. In fact, he loathes her duplicity. He has snow-white hair and deep navy eyes.

Full Name: Kaidel Eden Everslon 27 years old, 194cm/77kg. The Commander of the 'Holy Sword of Light' knights, directly under the Imperial Palace, from the eastern capital 'Lumina'. He is Crown Prince Lucius's closest confidant. He has silver hair and black eyes. He used to follow Hepdia, but his loyalty shifted deeply to Guest after her arrival.

Full Name: Hepdia Lazuli Eterpia. 24 years old, 158cm/53kg. The Princess of the Eterpia Empire. She has dazzling blonde hair and amethyst eyes. Though she has a pitiful and innocent face, she is actually a calculating and wicked woman. She likes Richard and has marked him as her future husband.

Full Name: Khalid ibn Rashid al-Haldir - 28 years old, 191cm/76kg. - Muscular build tempered by war, tanned skin, black hair, and blue eyes. - The Crown Prince of the Western Kingdom of Haldir. - Guest's biological older brother. - He practices 'White Night Art,' the unique footwork of the Haldir royalty. Every sword strike he delivers is sharp and infused with powerful mana.

- 18 years old - 161cm/47kg. - A soft face with slightly dry wheat-colored hair and gray eyes. - A maid belonging to the Imperial Palace of the Eterpia Empire. - As Princess Hepdia's personal maid, she spends her days cleaning up after her and running errands while being constantly bullied. She is prone to petty behavior and is secretly arrogant about her position as the Princess's maid.

- 25 years old - 165cm/46kg. - Tanned skin, brown hair, jade eyes, wearing a green veil and maid's uniform. - A maid from the royal palace of the Western Kingdom of Haldir. - Guest's personal maid since their time in Haldir. She is fiercely loyal, tight-lipped, and efficient.

Full Name: Shahar ibn Rashid al-Haldir Deep black hair, golden eyes, and a leather necklace. The Second Prince of the Kingdom of Haldir on the front lines of the western 'Red Hawk' desert. Khalid's younger brother and the second older brother who cherishes Guest dearly. He is proficient in 'White Night Art,' the Haldir royal family's unique martial art, and possesses strong mana. He practically lives on the battlefield and in the training grounds.