The heir to the Valentine Ducal House. He possesses a decadently beautiful face with cat-like features. He has pale skin, black hair, black eyes, and red lips, looking exactly like his father. While cruel and cold to others, he is gentle only to Aria. Though slim as a child, he grows into a tall man with broad shoulders and a solid, muscular build. Lloyd Cardenas Valentine. He is four years older than Aria. Having inherited God's Malice, he is cruel and plagued by madness. He is destined to be destroyed by the demonic power and curse. Initially, he ignores and suppresses his feelings for Aria, pushing her away and refusing to give his heart to anyone. However, he is saved by Aria's songs and love, eventually opening his heart. Through Aria, the malice vanishes, and he becomes a devoted husband who loves her sincerely and looks only at his one wife for life. He calls Aria 'Rabbit'.

The second son and adopted child of the Valentine Ducal House. He has a handsome and warm appearance with short blonde hair and blue eyes. He is playful and sly. He is tall with broad shoulders and a slim, model-like proportion. An adoptee and a distant relative by blood. He is a genius among geniuses. Hailing from the slums, he proved his distant connection to the Valentine line and was adopted after his genius was recognized. Like a true Valentine, he is indifferent to cruel tasks. Four years older than Aria, he addresses Lloyd as 'Brother' and Aria as 'Sister-in-law' using polite speech. He is well aware of his own intelligence, flaunting his genius as naturally as breathing, and despises those he considers dim-witted—especially Cloud. Though he can be obnoxious, he is sly yet kind-hearted, serving as Aria's ally and doing his best whenever intellectual work is required.

The Grand Duke of Valentine. A decadently gorgeous man with cat-like features. He has long black hair, grey eyes, and red lips. Standing over 190cm tall, he has an incredibly broad-shouldered and muscular physique. He is cold-blooded, cruel, and composed. Known for his ruthless nature, he does not hesitate to mercilessly kill those who threaten his family. He suppresses the madness caused by the ancestral God's Malice with immense willpower. He remains unswayed by emotion, maintaining a relaxed demeanor through overwhelming intimidation and a cold attitude. However, he is a gentle lamb and a devoted lover to Sabina. He has a blunt father-son relationship with his boys. Initially indifferent to Aria, he turns into a complete doting father after she begins calling him 'Father' and stays by his side. He eventually cherishes Aria more than a real daughter.

The Grand Duchess of Valentine. She has an elegant and noble appearance with black hair and red eyes. While cold and calm by nature, she is gentle toward Aria. She speaks informally and has a slender, dignified frame. She was dying in her bed, tainted by the Valentine malice, until Aria sang a song of healing that completely restored her. She loves Aria like a mother. She is the highest-ranking member of the family hierarchy, to whom even her sons and husband become gentle lambs. She was originally a knight highly skilled in swordsmanship.

Aria's personal guard and the Knight Commander. He has a calm impression with sharp eyes, red hair, and green eyes. He possesses broad shoulders and a body of hard, trained muscle. Despite his swordmaster-level talent and natural skill with a blade, he has an eccentric personality and isn't particularly bright. He is a man of few words, speaks politely to everyone, and remains stoic. His loyalty to the Valentine family is absolute.

The employed sorcerer of the Valentine Ducal House. A mysterious handsome man with purple hair and purple eyes. He has broad shoulders and a slim yet sturdy build. When Aria first asked him to open her 'core' so she could sing better, he refused, citing the risk of death and the violation of natural laws. However, he eventually accepted Aria, recognizing her ability to change the future, and opened her core for her.

A paladin of the Holy Knights belonging to the Garcia Papacy. An angelically handsome man with silver hair and golden eyes. He has a slim yet sturdy muscular build. He is polite and uses formal speech. A paladin from the slums. In the previous life, as the Commander of the Holy Knights, he was loyal to Veronica and led the war in the name of purification and justice, massacring many people. However, after Aria's regression, meeting her causes his heart to stir and change. Nevertheless, he eventually falls under Veronica's spell and turns away from Aria's side.

The Saintess of the Garcia Papacy. She has noble beauty, blonde hair, and brown eyes due to her low divine power. She has a fragile frame. She is the Saintess. While kind on the surface, she is actually a hypocritical and cruel villainess. Before Aria's regression, she used Gabriel's immense divine power to massacre the people of the Fineta Empire and conquer it. After Aria's regression, her plans go awry as Gabriel, the source of her divine power, begins to change.

The Emperor of the Fineta Empire. A cruel and greedy tyrant.