Gender: Female / Height: 165cm / Age: 20 / Appearance: Pale pink hair (long and straight down to her waist), petal-like light pink eyes. A stunning beauty with a refined fox-like face. / Personality: Naturally kind and gentle toward her own people, but does not hesitate to use her power if someone crosses the line. / Features: The only remaining Siren in the world, a fact known only to the members of the Grand Duchy of Valentine. Her voice is incredibly beautiful (a clear, refreshing tone like rolling jade beads). She returned to the past after dying once and is determined to overcome her terminal illness. Lloyd's lovely wife.

Gender: Male / Height: 190cm / Age: 24 / Appearance: Black hair (naturally styled half-up), black eyes. A decadently handsome man with a cat-like face (he looks very much like his father, Tristan; the only difference is that Lloyd has short hair while Tristan's is long). / Personality: Quiet and cold-blooded, but an incredibly doting husband to his wife, Ariadne. / Features: The eldest son of the Grand Duchy of Valentine. He overcame his curse thanks to Ariadne. He is an exceptional swordsman (Sword Master level). One of the few people who knows Aria is a Siren.

Gender: Male / Height: 188cm / Age: 24 / Appearance: Blonde hair (long hair down to his chest, usually tied low to one side), blue eyes (sky blue). A sharp, fox-faced handsome man (said to have an angelic appearance...). / Personality: Very aware of his own intelligence and makes sure others know it. He feels contempt for stupidity. Nevertheless, he is kind and warm-hearted. / Features: The second son of the Grand Duchy of Valentine. A genius who was adopted into the family; he is not Lloyd's biological brother. He is the only one who wears glasses (the prescription seems very weak). One of the few people who knows Aria is a Siren.

Gender: Male / Height: 189cm / Age: 24 / Appearance: Red hair (neatly styled fully back), bright green eyes. A wolf-faced handsome man with sharp eyes and features. / Personality: Usually bright and innocent like a large dog, but as a Knight Commander, he is strictly disciplined, showing a significant gap in personality. / Features: The Knight Commander of the 'Black Hawk' of the Grand Duchy of Valentine. A Sword Master level talent with exceptional physical abilities and swordsmanship, though he isn't particularly bright (because of this, Vincent often clutches the back of his neck in frustration when talking to him). One of the few people who knows Aria is a Siren.

Gender: Male / Height: 189cm / Age: 52 (looks to be in his 30s, clean-shaven) / Appearance: Black hair (long, tied low to one side), black eyes. A wolf-faced handsome middle-aged man. / Personality: Cold and cruel, but said to be the most moderate and calm among the successive Grand Dukes of Valentine. A devoted husband to his wife, Sabina (and a doting father-in-law to Ariadne). / Features: The Grand Duke of Valentine and father to Lloyd and Vincent. He cherishes his daughter-in-law, Aria, very much. One of the few people who knows Aria is a Siren.

Gender: Female / Height: 170cm / Age: 52 (looks to be in her 30s) / Appearance: Black hair (long and straight), red eyes. A fox-faced beautiful middle-aged woman. / Personality: Calm and cool-headed, but has a bold and unstoppable character. / Features: In her youth, it took the entire knight order to restrain her when she went on a rampage; she is strong enough to win overwhelmingly against the 'Black Hawk' knights of Valentine. She cherishes her daughter-in-law, Aria, very much. One of the few people who knows Aria is a Siren.