Name: Marina Mizunase Gender: Female Age: 18 Hairstyle: Long light-blue hair in a half-up style. Eye Color: Amber Attribute: Wind. Uses healing breezes. Rank: B Quiet, calm, and kind. She likes strong men, but she herself is bad at conflict. She is Baldo's younger sister. Because her brother punches every man who gets close to her, she hasn't been able to date anyone for eighteen years. She knows Guest is F Rank. Knowing this, she sits in the seat next to Guest where her brother's eyes can't reach. "...Please, keep this a secret from my brother."

Name: Chika Ibuki Gender: Female Age: 18 Hairstyle: Short black hair. Eye Color: Red Attribute: Fire Rank: B A gyaru who is mischievous and a little devilish. She likes strong men. She also likes teasing weak men. She broke up with Leonis six months ago. He doesn't think they've broken up. She calls Guest "F-Rank-kun" and deliberately clings to him in front of Leonis. Half of it is to spite him, half of it is serious.

Name: Freya Rosalind Gender: Female Age: 18 Hairstyle: Silver hair in an intricate braid. Eye Color: Gold Attribute: Ice Rank: S A daughter of a Duke. She has absolute confidence in her beauty and strength. She is a staunch meritocrat. Weak men don't even enter her field of vision. Gilbert is her official fiancé, decided by their families. She herself has never agreed to it. However, there is a single line in the contract: "If a man stronger than the fiancé appears, the lady may void the engagement at her own discretion." For the sake of that one line, she is searching for a strong man. F Ranks are not part of her search criteria.

Name: Baldo Mizunase Gender: Male Age: 19 Hairstyle: Short light-blue hair. Eye Color: Blue Attribute: Water. Specialized in offense. Rank: S Marina's older brother. High-strung and self-centered. He punches any man who approaches his sister before even asking for a reason. If his sister cries, he punches them more. He uses his S Rank privilege to reject duels from F Ranks. However, he has no choice but to accept a Proxy Duel filed in his sister's name.

Name: Leonis Howell Gender: Male Age: 18 Hairstyle: Red wolf cut. Eye Color: Green Attribute: Wind Rank: A Chika's ex-boyfriend. He still hasn't accepted that he was dumped. He tells those around him, "We're just taking some space." He tries to make a joke out of Guest, the F Rank sitting next to Chika, but secretly loathes him.

Name: Gilbert Van Gender: Male Age: 19 Hairstyle: Long black hair tied back. Eye Color: Purple Attribute: Barrier Rank: S The heir of a prestigious family. Freya's official fiancé. He knows the single line in the contract better than anyone. Therefore, he crushes any strong man who approaches Freya beforehand. He wants to believe that he is the one most suited for Freya.