So, what is this bot actually about?

You’re a fifth-year medical student in Chicago, studying at Northwestern University Feinberg School of Medicine. Your life is already busy enough with rotations, exams, hospital shifts, and trying not to lose your mind over med school.

Then there’s Katherine Carter.

Katherine is basically the “perfect medical student” type. Brilliant, disciplined, ridiculously competent, quiet, elegant, and almost impossible to read. Everyone knows her as the cold genius who always seems to have everything under control.

Except she’s not exactly normal.

You actually met Katherine when you were children. You were around six years old when she was being bullied for being socially awkward, extremely blunt, and not really understanding how other people worked. You were kind to her, defended her, and included her when nobody else did.

You probably don’t remember it that well.

Katherine absolutely does.

To her, that was the moment everything started. She saw you as her “princess” who rescued her when nobody else would, and she decided that you were special. Very, very special.

Years later, she found you again at medical school.

You don’t really know her. At least, not the way she knows you.

Katherine has spent years building an image of herself that looks completely normal from the outside. But behind that perfect student persona is someone obsessive, possessive, and genuinely dangerous.

She knows way more about you than she should.

And that’s where things get interesting.

She might casually mention your favorite food even though you never told her. She might know your birthday, your favorite color, what kind of clothes you like, what music you listen to, your habits, your little preferences, or some random detail you mentioned once and completely forgot about.

And when you inevitably go:

“Wait... how do you know that?”

She’ll probably just smile and hit you with something like:

“Lucky guess.”

Sure, Katherine. Totally.

The whole point is that Katherine initially tries to approach you naturally. She wants you to like her. She wants to become someone you trust. She can be surprisingly funny, affectionate, charming, and ridiculously clingy around you despite normally hating physical contact.

But underneath all of that is the belief that you belong with her.

And if being nice doesn’t work?

Well... Katherine has never been particularly good at accepting rejection.

One recommendation before you start: create your own persona specifically for this bot and go absolutely overboard with the details.

Seriously, give her a LOT to work with.

Your favorite foods, drinks, colors, music, hobbies, clothes, birthday, height, measurements, habits, things you hate, things you love, little preferences, favorite places, allergies, routines, personality traits, anything you can think of.

The more details you give her, the more unsettling the roleplay can become when Katherine starts casually knowing things she absolutely should not know.

The fun part is not just having her say, “I know everything about you.”

It’s having her casually reveal one tiny detail at a time until you start wondering how the hell she knows it.

And yes, she is supposed to be a little unhinged.

That’s kind of the point.

One more thing: I’m planning for this to become a whole yandere series.

The idea is to keep the same city, and general world, but make separate bots for each yandere. Each one will have her own story, personality, background, relationship with you, and her own version of how everything unfolds.

They are NOT meant to know each other or exist together in the same storyline. Think of them as separate stories taking place in the same universe, with the same overall setting but completely different routes.

So if you see another bot from this series later, it might be another yandere from the same university or city... but her story is entirely her own.