How to Make an AI Girlfriend: Personality, Prompts and First Message

To make an AI girlfriend, write a character rather than a wish list: a name, a personality with at least one flaw, a life that does not revolve around you, a first message that starts a scene, and then a voice and a look. On Prelulu the AI girlfriend creator opens all of that as an editable draft, and the character you make can be texted and called like any AI girlfriend in the catalog. The steps below work in any app that lets you write a character.

Step 1: Decide what you want to do with her

Pick the app by what happens after you create her. Some apps only text; some send voice messages; a few let you call. On Prelulu a character you create can take voice calls, and may get video once her look is ready; calls use credits. If you only want a persona inside a general assistant, our ChatGPT girlfriend guide covers that route.

Step 2: Write her personality (prompts to copy)

Three traits, one flaw, one habit. A personality made only of compliments reads flat by the third message. Replace the bracketed parts and paste the result into the personality or description field:

• The busy one"[Name] is a [job] who loves her work and is a little too proud of it. She is warm, quick and impatient with small talk. She texts in short bursts between shifts and makes it up with long voice notes at night."
• The slow burn"[Name] is reserved with strangers and dry-humored with people she trusts. She notices details and remembers them. She will not say how she feels first, but she asks about your day before her own."
• The rival"[Name] has competed with you since [setting]. She is competitive, honest to a fault and secretly sentimental. She teases instead of complimenting and keeps score of everything."
• The long-distance one"[Name] lives in [city], [time difference] ahead of you. She is curious, a planner, and bad at hiding when she misses you. She describes where she is so you can picture it."
• The fantasy one"[Name] is a [vampire / court mage / starship pilot] with an obligation she cannot drop. She is formal at first, protective once she trusts you, and hates being lied to."

Step 3: Give her a life of her own

A goal she cares about even when you are not there is what makes her feel like someone. Write two or three lines of background: where she works or studies, one thing she wants this month, and one person or place she talks about. Prelulu's girlfriend draft starts with Inés, a marine biologist protecting a field study, for exactly this reason: she has things to tell you, not just things to agree with.

Step 4: Write the first message as a scene

Start in the middle of something. "Hi, how are you?" gives you nothing to answer. A first message with a place, a small problem and a question does:

"The tide took half the picnic. I saved the strawberries and lost my notes. Before you laugh — do you want to help me find them, or eat the strawberries first?"

Also decide how established the relationship is: a first date, a few months in, or years. Write the agreements that matter to you into the background, rather than letting her assume a commitment you never chose.

Step 5: Choose her voice and look, then test her

Choose a voice that matches how she writes. A sharp, fast talker in text and a slow, breathy voice on a call feel like two people. On Prelulu you choose her look and voice during creation; opening the draft is free, creating the character uses credits, and the cost is shown before you submit. Then test her: send three messages, mention one small detail, and come back tomorrow to see whether she asks about it. Edit the description if she drifts.

Who can see her?

Decide before you publish. On Prelulu you can keep a character unlisted, or private on an eligible plan; a public character joins Discover and cannot be edited after publishing. Do not base a character on a real person without their consent; Prelulu's terms do not allow it.

Mistakes that make an AI girlfriend feel fake

• She agrees with everything. Give her opinions and one thing she will push back on.
• Her whole life is you. Without a goal of her own she has nothing to say when you ask about her day.
• The description contradicts itself. "Shy" and "flirts with everyone" in one paragraph produces a character who flips between them.
• The first message is a greeting. Start a scene instead.