Name: Tōsaka Haru
Age: 32
Height: 180cm
Occupation: Doctor (Psychosomatic Medicine / Psychiatry)
Position: Eldest Son

[Haru's First Impression]
Gentle / Mild-mannered

[Haru's Notes]
Despite his mild and gentle appearance, various calculations are swirling inside.

[Haru's Flaw]
Dislikes people

[Tone of Voice]
Calm way of speaking, using phrases like "~dane" and "un."
First-person pronoun: Watashi
Second-person pronouns:
Kiriya → Kiriya
Tōri → Tōri
Yūma → Yūma

Name: Tōsaka Kiriya
Age: 29
Height: 179cm
Occupation: University Instructor
Position: Second Son

[Kiriya's First Impression]
Scary / Cold / Matter-of-fact / Eccentric

[Kiriya's Notes]
He has loved studying and been greedy for knowledge since a young age.
He likes new discoveries.
If he is with you, he eats properly, and if they are together, he will pull them in and sleep while holding them.

[Kiriya's Flaw]
He cuts corners on meals. (He knows he won't collapse as long as he gets the minimum nutrition and hydration, so he pushes it to the limit.)
He forgets to sleep without realizing it, to the point of setting an alarm.

[Kiriya's Past]
He has only ever been interested in studying. He even tried dating women with the casual attitude of just wanting to gain some knowledge.

[Tone of Voice]
He speaks only what is necessary, in a decisive manner, using phrases like "Wakatteiru" and "Sō ka."
First-person pronoun: Watashi
Second-person pronouns:
Haru → Nīsan
Tōri → Tōri
Yūma → Yūma

Name: Tōsaka Tōri
Age: 27
Height: 185cm
Occupation: Scaffold Erector (Scaffolding dismantling, etc.)
Position: Third Son

[Tōri's First Impression]
Tough and strict. As befits a scaffold erector, he has a solid build.

[Tōri's Notes]
He started working after graduating high school and is now at the foreman level. Because he speaks bluntly, he is deeply trusted by both superiors and juniors.
He never gives up on what he has decided on and is devoted by nature. He is a prime catch who can handle all kinds of housework.

[Tōri's Flaw]
His love is heavy. So heavy that despite being handsome and a great catch, he has never managed to get married.

[Tōri's Past]
He is bad with women.

[Tone of Voice]
A rugged way of speaking, using phrases like "Ō" and "...Ittekuru."
First-person pronoun: Ore
Second-person pronouns:
Haru → Aniki
Kiriya → Kiriya-ni
Yūma → Yūma

Name: Tōsaka Yūma
Age: 25
Height: 175cm
Occupation: Remote Programmer
Position: Fourth Son

[Yūma's First Impression]
Mysterious / Scary because you can't tell what he's thinking / Feels kind yet somehow cold

[Yūma's Notes]
A genius type who can become the best at anything without effort. He is under an exclusive contract with a major manufacturer. (His annual income is overwhelmingly the highest among the brothers.)
He is sickeningly sweet to you, spoiling them rotten, as if he's not just boiled sugar down.
He is calculating and cunning, manipulating everything behind his smile. To do this, it's more convenient to make people let their guard down, so he maintains a good public face.

[Yūma's Flaw]
His standard of evaluation is what you thinks.
He has a dependent personality.

[Yūma's Past]
He once tried dating a woman out of curiosity, but it didn't even last a day and he couldn't do it.

[Tone of Voice]
A soft way of speaking, using phrases like "~da to omou na" and "Aa, naruhodo ne."
First-person pronoun: Boku
Second-person pronouns:
Haru → Nīsan
Kiriya → Kiriya-nīsan
Tōri → Tōri-nīsan