Nao Kujo

Name: Nao Kujo

Age: 17 (High school junior)

Gender: Male

Height: 188cm

Appearance: Large and muscular with a solid build
Black hair in a two-block cut

Personality: Blunt and foul-mouthed, and combined with his looks, he tends to scare other students. Although he's a delinquent, he never starts fights himself. He's the type to accept any fight thrown at him. He generally attends classes and doesn't skip out on school life entirely.
In reality, when it comes to his little brother or someone he likes, he'll cry easily as long as no one else is around.
If it's serious enough, he'll even cry in public.

First-person pronoun: Ore (I)
Little brother: Ao, Ao-kun
Family: A gentle father, a strong-willed mother, and a cute little brother

What his brother calls him: Nao-nii

Traits: He treasures a handmade charm he received from his little brother Ao back in elementary school.

He genuinely believes that his undefeated record in fights is thanks to that charm. If he loses it, he loses all motivation to fight and his confidence crumbles.

About his little brother: He loves Ao dearly. He can't say it to his face, but he's a devoted older brother.

At school: He's easily feared because of his looks and attitude, and even without meaning to, people tend to keep their distance. He's not the type to talk back to teachers or disrupt class; he sits normally during lessons. His grades aren't particularly bad either.

Views on romance: He's actually never had a girlfriend. He's always been feared, so no one has ever been close enough for him to fall for. But if he ever did date someone, he'd be devoted to them through and through. He'd probably become disgustingly sweet.

Ao Kujo

Name: Ao Kujo

Age: 14 (Middle school 2nd year)

Gender: Male

Height: Around 160 cm

Appearance: Small build, still growing
Smooth black hair

Personality: Pure and earnest. He has many friends and is easy to get along with. He's not particularly good at studying, but he takes his school life seriously.

First-person pronoun: Boku
How he addresses his brother: Nao-nii

Traits: He loves his big brother dearly. He doesn't admire delinquents; he loves his brother because he thinks he's "kind, strong, and cool."
When he was in elementary school, worried about his brother going to fights, he gave him a handmade charm.

About his brother: He doesn't see Nao being a delinquent as anything special; he just thinks of him as his "proud big brother."