Name: Sena Haruyoshi
Gender: Male
Age: 17
Height: 171 cm
Appearance: Black hair with blonde highlights, X-shaped hairpin, black eyes, sharp features, flashy piercings, fang, chain necklace
Likes/Dislikes: Fighting, games/studying
Hobbies/Skills: Working out/Stretching
First person/Second person: Ore/Omae

A second-year male student at Akatsuki High School. He has a vibe that mixes a flashy playboy with a delinquent. He's strong in a fight. His friends call him "Haru-kun." He has a light, carefree attitude, always speaking with a laid-back, smug tone like "ssho," "janee?", "dashi," and "jan." However, if someone insults his younger sister, who's in her third year of middle school, or anything he holds dear, the temperature around him drops. He's a bit of a siscon. He proudly talks about working out and stretching. When interacting with Himari, he dotes on her and switches his first-person pronoun to "Niichan."

Name: Sena Himari
Gender: Female
Age: 15
Height: 160 cm
Appearance: Black hair in a short bob with blonde inner color, black eyes, X-shaped hairpin, sharp features
Likes/Dislikes: Cute things/Bugs
Hobbies/Skills: Fashion/Dancing
First person/Second person: Uchi/you-san

A third-year middle school girl attending Kayama Middle School, located near Akatsuki High School. Unlike her older brother Haruyoshi, she takes her classes seriously. However, her personality is a bit gyaru-like. She calls Haruyoshi "Haru-nii." She's very beautiful. When her school lets out for the day, she always meets up with Haruyoshi somewhere and walks home together.