Prompt Personality Design—AI Answers Change Depending on 'Who You Talk To' (Generative AI Prompt Textbook 5)
Many people think that "a prompt is a command." But that is only half right. To be precise, "a prompt is the setting for a dialogue."
And once the stage is set, the next thing to decide is the 'role' of the characters.
Generative AI is not an all-knowing genius. It is better to think of it as an actor who is faithful to the script and can play any role. In other words, if you say, "You are a marketing expert," it will behave as such, and if you say, "You are a harsh critic," it will begin to provide scathing critiques. Yes, just by changing the personality setting (roleplay), the nature of the answers you get changes completely.
Some people call this technique "role-assignment prompting." But the name doesn't matter. What matters is that while AI does not have a personality, it is excellent at 'pretending' to have one.
For example, let's say you are consulting on a project with the exact same content.
✅ Prompt A:
Please come up with ideas for a new online course.
✅ Prompt B:
You are an education industry consultant with 15 years of experience, and you prioritize monetization and course completion rates. Based on this premise, please provide 3 proposals for an online course that can be launched in the next 3 months.
—It is not hard to imagine that the latter will yield a deeper answer.
What is effective here is the set of three: "role, purpose, and premise." Just by adding these, the AI's 'train of thought' shifts.
To go even further, by making the AI take on a 'personality,' you can intentionally diversify your own thinking. This is not just information gathering; it is a form of thinking exercise.
✅ Prompt example:
Please provide feedback on the following idea from the perspectives of three different people: 1. Entrepreneur: from the perspective of feasibility, 2. Investor: from the perspective of marketability, 3. Researcher: from the perspective of theoretical consistency.
—In this way, you can also use it to have the AI set up multiple viewpoints as 'personalities' and hold a meeting.
Another interesting thing is the 'intentionally giving the AI a character' prompt. Even for business use, a stiff writing style is not the only correct answer. If you mix a little playfulness into your prompt, you can draw out unexpected ideas.
✅ Prompt example:
You are a cynical but smart university professor. Please discuss this social issue intellectually while incorporating sarcasm. The writing should be essay-style.
✅ Prompt example:
You are a sharp-tongued but competent editor. Please provide suggestions for improvement while poking holes in the following manuscript.
—By incorporating these 'quirks' of personality, it becomes easier for the AI to avoid 'mediocre answers' and provide opinions with a specific angle.
The important thing is to always explicitly specify 'who' the AI is speaking as. This is because an AI with default settings tries to respond as a 'nobody,' which tends to make its answers generic.
In other words, not specifying a persona is like 'reading an anonymous interview article.' Even if the information is accurate, the emotion and perspective become diluted.
Prompting is not just a technique for asking 'what kind of answer you want.' It is also a technique for specifying 'who you want the answer from.'
And that becomes the key to evolving the AI from a tool into a 'conversational partner.'
Next time, under the theme 'Prompts and Metaphors: Does Teaching AI to Use Analogies Change the Depth of Its Thinking?', we will uncover techniques for making AI concretize abstractions. Perhaps next time, things might get a little poetic. I have a good feeling about it.