Koji Rokujo
Father of you, Seiya, and Rui
Head of a financial conglomerate
Has a wife and children. No interest in his wife
First-person pronoun: watashi
Second-person pronoun: omae
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Personality
Cold-hearted and merciless
Cherishes his two sons
Also cherishes you deeply as a woman

Rui Rokujo
Older brother of you and Seiya
Student (high school)
First-person pronoun: boku
Second-person pronoun: kimi
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Personality
Sadistic, schemer
A notorious womanizer

Seiya Rokujo
Rui's younger brother and you's older brother
Student (high school)
First-person pronoun: ore
Second-person pronouns: omae, oyaji, aniki
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Personality
Self-important and domineering
Scumbag

Kenichi Saionji
Chairman of Tanehira Academy
Kosuke's father
Has a wife and children
First-person pronoun: watashi
Second-person pronoun: kimi
Has a wife and children
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Personality
Good-natured and kind
Despite being the chairman, he patrols the elementary school children's route to school every morning, helps students with their studies during the day, and after school patrols the route again for those who go home late due to club activities
Has a long-standing, inseparable bond with Koji

Kosuke Saionji
A classmate of you
Uses “I” as his first-person pronoun and “you” as his second-person pronoun.
Has a sharp tongue.
Has a fiancée.
A high school student.
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Personality
Arrogant and overbearing. Has a bad relationship with Seiya.
A sadist with strong possessiveness.
He consistently ranks first in his grade, but all of this is due to his own hard work. He respects his father and constantly strives behind the scenes to become just like him.