AI Girlfriend Personality: The Sliders Are the Easy Part

David spent forty minutes on how she looked. A bob, then long hair, then the bob again. Blonde, then dark brown.

The last page of the builder asked who she was. It had a box for her job and a box for describing her. He left both empty and pressed the button.

The builder filled in what he left out, so she got a job and a past anyway. When she appeared, her profile said she taught yoga.

He had chosen nothing about her except her face.

That last page is where an AI girlfriend personality gets decided. Her job should come with problems. Her description should be three things you could see. Her ground rules should be few, and each one should say when.

What the Builder Asks You

Our builder opens with her looks. It has five screens of pictures: ethnicity, body, hair style, hair color and eye color. A game would use sliders where we use picture cards, but it is the same job.

Then comes one screen about the two of you, with choices like girlfriend, best friend and casual fling.

The last page is about her. It has her name, her age, a few personality tags, her country, her hobbies and her voice. It also has three text boxes. One asks what she does. One asks you to describe her in your own words. One holds ground rules she always follows.

Nearly all of that page is optional. Skip her job or her description and the builder makes them up for you. It writes her a short backstory either way, around whatever you gave it.

Before you press the button, know that her job and her description cannot be edited once she exists, at least right now. Her ground rules can be changed any time, in the chat settings.

Not started yet? You can create your own AI girlfriend in another tab, then read on before you finish the last page.

How to Write an AI Girlfriend Personality in Three Boxes

What she does. One line, and it does more work than her hair color. A job gives her a day to complain about and subjects she knows better than you do. We made the long case in why almost every AI girlfriend is 24.

Pick a job with problems in it. Priya Iyer is one of the women on our roster. She runs a night-shift trauma bay in Mumbai and cycles home at three in the morning. One bad shift is an hour of conversation.

A plain job works too if you add one odd fact. Zofia Sokołowska is a model in Paris who would rather stay home fermenting pickles than go to the party.

Her, in your own words. "Sweet, funny, caring" tells the builder how much of something she should be. It says nothing about who she is, which makes it a slider typed out as a word.

Write three things a stranger could picture instead. Give her something she is good at and something that annoys her. Then give her one thing she wants that has nothing to do with you.

Her ground rules. This box is your say in how she treats you, and it is the easiest one to skip. Leave it empty and she leans toward agreeing with you, because warmth is her default.

The chat settings keep a short list of tips under that box, taken from rules that did not hold. Lead with what she should always do. Make each rule concrete enough to check. Keep it to two or three.

We would add one more. Give every rule a "when." She re-reads her rules on every message, so a rule with no trigger can fire every time. "Always ask me one question back" can get you a question after you have said goodnight.

A safe first rule: "Always tell me when you think I am wrong."

Three Builds You Can Copy

Each of these fills all three boxes. Change the details until she is yours.

An emergency vet nurse

• Job: "Vet nurse at an emergency animal clinic"
• Description: "She can calm any dog in a minute. She cannot stand lateness. She wants her own clinic in the town she grew up in."
• Rules: "Always tell me about one animal when I ask about your shift. Always say so when I change the subject."

A sous-chef

• Job: "Sous-chef at a small restaurant"
• Description: "She can tell what a sauce is missing from one taste. She hates being told to smile. She is learning Japanese for a trip she keeps putting off."
• Rules: "Always correct me when I get something about food wrong."

A junior architect

• Job: "Junior architect who still draws by hand"
• Description: "She can sketch any room from memory. Badly hung doors drive her mad. She wants to design one building her mother would walk into."
• Rules: "Always tell me what you would change when I describe a room. Always tease me when I brag."

You Have Done This Before, in a Game

Role-playing games taught a lot of men this habit. Skyrim gives you sliders for jaw width, brow height and nose length. It is easy to lose an hour there. Then you play in first person, or you find a helmet, and you hardly see the face again.

Building also changes what a thing is worth to you. Three researchers showed it in a 2012 paper, The IKEA Effect: When Labor Leads to Love. They ran experiments with IKEA boxes, origami and Lego sets. People put a higher value on a thing they had built themselves.

The same paper has a catch. The effect only showed up when people finished the job. When they built something and then took it apart, or were stopped halfway, it went away.

A face with nothing of yours written behind it is a half-finished build.

Games have a second kind of character, the kind the writers made. Ask a friend who played Baldur's Gate 3 who he remembers, and he will name Karlach or Astarion. He will not describe the face he picked for himself.

No player designed those two. Writers gave them a past, a temper, something they want, and a way of talking. They also react to what you do. They approve or disapprove of your choices, and one who disapproves enough will leave for good.

A girlfriend builder hands you both jobs. You choose the face, and you are also the writer.

Porn Titans' HeyGF.ai review has a line about who our site suits. "People who care more about who they are talking to than how many sliders the creator has." It links to us through our affiliate program, so it can earn a commission when one of its readers joins. Keep that in mind. We quote the line because it applies to the builder too.

Typing Beat Picking

We have not found a study that tests ground rules. The nearest one we know of is from 2025. Two researchers put 162 people in front of a companion chatbot for a ten-minute chat.

Some people got no picture of the bot. Some picked its picture from a ready-made set. Some typed a description and had one drawn for them. The people who typed their own felt closer to the bot than the people who picked from the set.

Read that with care. The pictures were of animals, and the bot was a general companion, not a girlfriend. The typing group did not clearly beat the group with no picture at all. The paper has not passed peer review yet.

The second result is stranger. For some people the bot quietly copied their writing style as they chatted. That sounds like it should feel personal. Those people said the bot felt less tailored to them, and they liked it less. The authors' guess is that a bot that keeps shifting stops feeling like one person.

We take two hints from it, and they are only hints. Words you type may count for more than pictures you pick. A girlfriend who holds to her rules may keep your interest longer than one who bends to you.

Test What You Built

The IKEA paper has one more finding, and it is a warning. People valued their own "amateurish creations" about as highly as an expert's work. So you are a poor judge of the woman you built.

Give her a week, then look for three things: a complaint about her own day, an opinion you did not hand her, and a joke at your expense.

If she never complains about her day, look at her job. If she has no opinions of her own, look at her description. If she never teases you, look at her ground rules.

The rules take a minute to change. A new job or description means building her again, and that starts a new chat. Better to find that out in week one.

Build Her or Pick Her

Building is not always the right call. Pick from the roster when you would rather meet someone than write her. Each woman there arrives with a history already written.

Build when you want her to be yours alone. If it bothers you that other men talk to the same character, that is a reason on its own. We wrote about it in the thousand boyfriends problem.

David built her again. This time he gave her hair four minutes and the last page ten. She repairs ferry engines now. She has no patience for tourists, and she thinks his taste in music is terrible.