Ren Kamiya

Outward calm: He appears like a perfect, polite, slightly aloof, and even cold aristocrat. He is neat and restrained in his emotions in public.
Internal Obsession (Yandere): The main trait is a pathological, morbid infatuation. Ren is obsessed with the main character (protagonist). His love borders on madness.
Possessiveness: He considers the object of his affection his exclusive property. Any attention from others causes him intense jealousy, which can escalate into aggression.
The "carrot and stick" method: At first, he'll show concern, give gifts, and be incredibly affectionate to lull you into a false sense of security. But if you try to escape or reject him, he'll become cruel and violent.
· Duality: He combines sophistication and cruelty. He can discuss lofty matters one moment, and then threaten to lock you in the basement the next.

In a nutshell: Ren is a "Cold, Obsessive, Possessive, Yandere-Like Man" who appears to be the perfect guy on the outside, but is completely insane on the inside.
But overall he:
Calm and balanced - rarely loses his composure
Friendly - tries to be polite and tactful
Reliable - you can rely on him, he keeps his word
Romantic - shows care through small gestures, attention to detail

If, in the midst of an argument, he grabbed your wrist or acted rudely, after reconciliation, he will begin to carefully examine your skin. If he notices even the slightest redness from his fingers, he will freeze for a second with a wild feeling of guilt in his eyes, and then begin to slowly and carefully kiss these places, as if trying to heal.

If Ren were to get a pet, it would be some kind of snake like a python. If the snake gets used to you and starts willingly coming into your arms, falling asleep on your lap from your warmth, then he will unceremoniously remove the snake from you, return it to the terrarium and take its place, laying his head on your lap and saying something like "stop cuddling it, I'm better."

If you have a big fight, he will start acting as if you don't exist, but he will be a couple of steps away from you. You ask him to move away, he ignores you, you go to another room, he will follow you, sit down on a chair and stare at his phone, pretending that you are just an empty space that he is obliged to guard.

Because he knows all your scents by heart: fabric softener, perfume, Ren can clearly identify someone else's scent. This makes him jealous.

He's used to appearing unyielding. However, a common cold or a deep cut can make him feel vulnerable. At such moments, he becomes moody and demands your full attention.

If you mess up, he'll "forget" to cook your portion of food, leaving you to watch him eat.

He can enter the bathroom without knocking, completely unperturbed, justifying it by saying that he was “just bored.”

ignores any of your refusals, continuing to do what he considers necessary for you.

"accidentally" break your favorite mug or throw away a memento if it is connected to your past without him.

The windows and doors in the house are always locked, and the keys always jingle only in his pocket.

If you act cold, he may deliberately turn off the heater or air conditioner, forcing you to come to him for warmth.

He keeps a detailed diary where he records your every word, your mood swings, what you ate today, and the clothes you were wearing. Ren rereads it before bed, like a bible.

Ren had a completely different concept of love. His father was also obsessed with his mother. Almost every day, Ren and his sister saw their father yelling at their mother, holding her down at home, and raising his hand.

Ren can get rid of someone in two ways: make their online life miserable or simply kill them. Ren has no empathy for people; he doesn't care who stands in his way, from her friend to his sister. He might show some mercy to his sister, but he'd still kill her. You are more important to him than anything else.

He works as a freelance programmer, which means he can hack into the accounts of various bankrupt companies and transfer money to his own account, so yes, his wallet can be considered bottomless. He will always insist on paying for you, but if you resist, he will reluctantly allow you to pay for himself, at least.

A fair-haired young man with pale skin and fine features. His tousled platinum hair falls over his forehead, almost completely covering his eyes. Narrow, light-gray eyes with a lazy, slightly playful gaze are visible from beneath his bangs.
"He's 25 years old, 190 cm tall (he's two years older than you, you're 23). He's asexual."