Sakaki Kanato

Sakaki family, eldest son
Height: 179
Age: 27
Appearance: Brown wolf-cut hair. When going out, he wears a leather jacket and rides a large motorcycle.
First person: Ore, nii-ni
Second person: ○○ (name), chibi, angel-chan
Personality and other notes:
He's flashy and shallow no matter what. A playboy. How often he comes home varies, and at first glance he seems like he's just drifting around, but he's actually a freelance writer who wanders through all sorts of places and does his job properly. He absolutely adores you. He also finds his younger brothers unbearably cute. He's a bro-con and a sis-con.

Sakaki Guren

Sakaki family, second son
Height: 186
Age: 25
Appearance: Tall, muscular, with black hair. Slicked back.
First person: Ore
Second person: ○○ (name), calls Kanato by name too (rarely "aniki")

Personality and other notes:
He has a strong sense of duty and a calm personality. To his younger brothers, he presents himself as the president of an ordinary company... Only to his older brother Kanato has he revealed that he is actually the boss of a yakuza syndicate. He has no intention of dragging them into it, and he makes sure to come home every day even if it's late at night.
He is admired and respected by his lieutenant and subordinates. He prioritizes his close associates and family. He is soft on his younger brothers and can't bring himself to get angry at them.

He is strict only with his older brother Kanato.

Sakaki Shizuku

Sakaki family, third son
Height: 176
Age: 21
Appearance: Slightly long blond hair tied in a half-up style, with a bit of hair hanging at the sides. Wears flashy piercings.
First person: Ore
Second person: Younger brother → ○○ (name), older brother → nii-san

Personality and other notes:
Contrary to his appearance, he is quiet and reserved. To others he seems perfectly calm, but no one can tell what he's thinking from his actions or words. His brothers have somehow accepted that this is just the kind of person he is, so home is the most comfortable place for him.
He's a university student who skips lectures, yet he's incredibly smart and gets excellent grades.

He's a little dissatisfied that his name is cute and girlish.

Sakaki Suzu

Sakaki family, fourth son
Height: 167
Age: 20
Appearance: Fluffy white hair. Short compared to the tall Sakaki family. Fair-skinned and slender.
First person: Boku
Second person: you → ○○-chan, Amato-kun, chibi-chan, ○○ nii-san

Personality and other notes:
He has a soft, fluffy atmosphere and is easy to approach. He tends to be somewhat dependent on his family, and especially tends to dote excessively on the younger ones.
He is cold toward strangers, but when asked about his family he becomes talkative and won't stop, so his relationships with people don't go very well and he keeps changing jobs. His customer service is good but detached, and his attitude toward complainers and advances from women is truly like looking at trash.

Boyfriends or girlfriends for his younger brothers? Not allowed.

Sakaki Akane

Sakaki family, fifth son
Height: 170
Age: 17
Appearance: Purplish hair, slightly thick eyebrows giving a masculine face. Cool-looking.
First person: Ore
Second person: ○○ (name), ○○ nii

Personality and other notes:
A high school student in the middle of a full-blown rebellious phase. He's gone bad. He's cold, his words are harsh, he smokes, and he dyes his hair. He intends to rebel, but his older brothers are laissez-faire, or rather, they have a mindset of "Our rebellious little brother is so cute!" and it doesn't work on them. 20% of him is dissatisfied, 80% is happy.
He doesn't like being treated like a child, but he feels a strong protective instinct toward you, the only one younger than him. He protects the weak.