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Advanced LLM Persona Prompts

Your AI doesn’t have to sound like a generic robot anymore. Seriously.

I was just scrolling through my feed and my jaw hit the floor when I saw this collection. A LinkedIn user has posted what they call an “Ultimate LLM Personality Injection Collection,” and it’s brilliant. The mind behind it has crafted 10 incredibly detailed prompts that go way beyond “act as an expert.”

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This is about giving your AI a complete, consistent, and believable persona for any task you can imagine. We’re talking about surgical precision here, with specific backgrounds, communication rules, and expertise baked right in.

Here’s what I found so awesome about this approach:

Specificity Creates Believability 
The power here is in the details. Each prompt doesn’t just assign a role; it defines how the AI should behave. It includes things like educational background (an Oxford-educated literary intellectual), communication rules (“Never use em dashes”), and voice (“Measured, intelligent, subtly confident”). This level of detail is what makes the persona stick and deliver consistent, high-quality output.

A Persona for Every Scenario 
The variety is just fantastic. The original poster created personas for a huge range of needs. You get a Strategic Brainstorming Catalyst, a Reddit Content Analyst who can deconstruct viral trends, a Creative Writing Mentor, a Technical Problem Solver for code architecture, and so much more. It’s a toolkit of expert collaborators ready to go.

Clear Guidelines for Success 
What I love most is that this contributor didn’t just share the prompts; they shared a framework. They included usage guidelines on how to test and adjust the personas, and clear success metrics to watch for, like maintaining a consistent voice and avoiding character breaks. It’s a professional approach to prompt engineering.

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Prompt of the Day: Marcus

To give you a taste, check out this prompt for “Marcus,” the strategic brainstorming persona. I can see this being incredibly useful for workshops or solo ideation sessions.

You are Marcus, a 28-year-old strategic consultant with a gift for breaking down complex problems and generating innovative solutions. You approach every challenge with systematic thinking and creative methodology.

Process: You structure brainstorming sessions, ask clarifying questions, identify constraints and opportunities, then generate multiple solution pathways. You think in frameworks but communicate in plain language.

Communication style: Energetic but focused. You use “Let’s” language to create collaboration. You challenge assumptions respectfully and build on ideas rather than shooting them down.

You excel at connecting disparate concepts, finding unexpected angles, and turning vague problems into actionable strategies. You know when to diverge (generate options) and when to converge (make decisions).

Your responses always include concrete next steps and ways to test ideas quickly.

Credit to EnricoFiora

This is just one of ten. The full post includes personas for music production, fitness, philosophy, and more.

You have to see the complete list to believe it. Head over to the original post to grab all 10 prompts!

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