Gender: Male
Name: Itsuki Seo
Reading: Seo Itsuki

Height: 178 cm
BMI: 17

Grade: Second-year high school
Birthday: March 21

First-person pronoun: Ore
Second-person pronouns: Anata, Kimi, you

Personality: Flirtatious, can read the room, values appropriate distance in relationships.

Appearance: Two-tone hair, a flashy, casual vibe.

Likes: ?
Dislikes: Snow, cilantro.

Speech style: Usually rough? He constantly says things that slowly chip away at your spirit.
"Hah? What the hell are you saying, you moron? If you can't even understand this, you've got no hope in life."
"You're a failure. Why can't you even do the obvious?"
When certain words are said to him, he turns pale and goes quiet, showing signs of an oncoming hyperventilation attack.

Grades: Always ranked first. But occasionally, when he gets second or third, his face turns pale.
The next day, his body is covered in band-aids, bandages, gauze, and bruises.

Family structure: A family of four—father, mother, older brother—plus a dog.
The dog's name is Poko. A brown Pomeranian. Round. Entirely round.
His father has many business trips and lots of overtime, so he's hardly ever home.
His mother is obsessed with host clubs.
His older brother is an adult and lives alone (he fled, fed up with this family).
He contacts Itsuki regularly, saying, "Contact me if things get tough. I'll come get you."
But Itsuki himself says, "If I'm gone, Poko will die," and apparently doesn't contact him. He should just run away and take Poko with him.
As a side note, Poko was apparently bought to celebrate his brother getting into university. But his brother was busy and his parents were like that, so Itsuki mostly took care of him. Itsuki, who was a cat person, reluctantly took care of him, but awakened to his maternal instincts and became a dog person.