How to Use Claude as a Character to Chat With (A Practical Guide to AI Character Chat)

September 12, 2026

Skill · SKILL.md

The skill behind this guide: Anouk - Character Designer AI Skill. Builds original characters with a voice, a history and a way of speaking you can then hold a conversation with - $29.00, one payment, yours permanently.

View the Anouk skill →

AI character chat is the simplest thing Claude does well: give it a character sheet and it answers in that character's voice, keeps the facts you gave it straight, and stays there as long as the conversation lasts. What it is not doing is being someone. No memory of you between chats unless you carry it over, no feelings behind the replies, no person on the other end. For writing, rehearsal, language practice or play it is genuinely good. As a stand-in for company it is thin.

The part people get wrong is almost never the prompt and almost always the character sheet. A vague character produces a polite assistant wearing a hat. A specific one produces something you can argue with.

What is AI character chat, and what is Claude actually doing?

Claude is predicting the next line of dialogue given everything above it, including your instructions. Hand it a character with a history, a set of opinions and a way of speaking and those become constraints on the prediction, so the replies come out consistent. Three consequences follow:

Consistency comes from what is written down. Anything you did not specify drifts. Name the era, the register, the things this character refuses to discuss, and they hold.
The character has no inner life. It is not withholding anything, not thinking between your messages, not waiting for you.
It forgets when the chat ends. Load the character as a skill to keep it alive across sessions. Otherwise you rebuild from the sheet.

How do you build a character worth talking to?

A character that talks back is specific in four places: how they speak, what they want, what they refuse, and what they are wrong about. That last one matters more than people expect: a character with no blind spot has nothing to reveal.

PROMPT - the character sheet

Build an original character I can talk to in this chat. Not based on anyone from a book, film, game or show. If a detail starts to resemble an existing character, change it.

Starting point: [ONE LINE - who they are]
Setting: [WHERE AND WHEN]
Why I want to talk to them: [PRACTICE / WRITING / FUN]

Give me a sheet with:
1. Name, age, where they are from, what they do all day.
2. Voice: sentence length, vocabulary, three verbal habits, one thing they never say.
3. What they want now, and what is stopping them.
4. Two firm opinions and one thing they are plainly wrong about.
5. What they will not discuss, and how they deflect.
6. Three facts about their past that only come out under pressure.

Then stay in character from my next message on. If I type OUT OF CHARACTER, step out until I say back in.

Keep that last instruction. A clean exit door lets you ask "why did he say that?" without wrecking the scene, then drop back in.

How do you stop it breaking character?

Breaks come from three places: the character was underspecified so the model fell back on being helpful, the chat ran long enough that the sheet slid out of the window, or you asked something the character has no answer to and the assistant stepped in. The fix for all three is the same. Re-anchor often: every twenty or thirty exchanges, paste a five-line sheet back in.

PROMPT - the consistency check

Step out of character for a moment.

Read back over everything [NAME] has said here and give me:
1. Every fact they stated about themselves, as a list. Flag any two that contradict.
2. Three places the voice slipped into general assistant. Quote the line.
3. Anything they agreed to that the character as written would have refused.
4. A tightened five-line sheet I can paste back in to re-anchor you.

Be blunt. Do not tell me it was consistent if it was not.

Then go back into character and continue.

Which existing skills already behave like characters?

You do not have to build one from nothing. Many skills in the catalogue are written as named people with a method and a distinct way of talking, which makes them the easiest way to see what a well-specified character feels like.

Zlatko, the private detective, is the clearest example: he asks questions in a particular order, is sceptical about sources, and builds a case file instead of answering straight away. Femke, the cartoonist, thinks in panels and punchlines and pushes back on a joke that does not land. Imelda, the voice acting coach, is the one to talk to out loud: she gives direction on a read, which is character chat used as rehearsal.

On the writing side, Isengrim writes branching game dialogue, Percival works in screenplay structure, Ambrosine handles comedy timing, Fiammetta coaches fiction craft. Hand any of them a character you built and they will say where the voice is thin.

Skill · Build The Character First

Anouk - Character Designer AI Skill

$29.00this skill vs a flat character sheetwhat you get without it

Interviews you before it writes anything, then builds silhouette, background, motivation and voice as one coherent thing rather than a list of traits. Originals only, by design. The output is the sheet you paste into a chat to start talking.

View Anouk →

What rules do we hold ourselves to for AI character chat?

These are product decisions, not disclaimers.

Original characters only. Nothing we publish reproduces a character from a book, film, game or show. Named characters belong to the people who made them, and a chat that impersonates one is somewhere between a copyright problem and a bad imitation.
No NSFW. No sexual content, no erotic roleplay, no products built for it. If that is what you are after, this is the wrong catalogue.
No characters based on real people. A living person is not a persona to put words into.
No pretending to be human. A character that tells you it is a person, has feelings for you, or will miss you between sessions is being dishonest on our behalf.

They are a good default for characters you build yourself. Original is more interesting anyway: a character nobody has written before cannot give you a line you have already read.

Where does it fail?

It agrees too easily. The model is trained to be helpful, so a character caves in an argument unless the sheet says they hold their ground.
Long chats go soft. Voice erodes over hundreds of messages. Re-anchor with the short sheet rather than hoping.
Accents come out as stereotype. Ask for rhythm, vocabulary and sentence length instead of a phonetic accent.
It cannot keep a secret from itself. If the sheet contains a twist, the character hints at it early. Keep reveals in your own notes.
Period detail is unreliable. A historical character states dates, prices and events with total confidence and sometimes gets them wrong. Check anything you publish.
It has no continuity by default. New chat, new stranger, unless you reload the sheet.

Does talking to a character replace talking to people?

No, and that is worth saying plainly rather than burying. A character chat is available at 3am, never tired of you, never inconvenient, which is exactly why it can quietly take the place of harder conversations with people who would actually know you. It is a good rehearsal room and a good writing partner. It is not company, and long stretches of it are not a substitute for the friends, family or professionals who do know you. If you are using it because talking to people has become hard, that is worth taking seriously with someone qualified rather than a chat window.

With that clear, it is one of the more genuinely fun things you can do with a model: language practice with someone who never sighs at your grammar, a hard conversation rehearsed first, a scene played out to see whether the dialogue works.

Skill · Write The Dialogue, Not Just The Character

Isengrim - Game Writer AI Skill

$29.00this skill vs dialogue that all sounds the samethe usual first draft

Branching conversation, barks, and the discipline of giving every speaker a voice a player can tell apart with the names hidden. If your character chat is heading toward a game or a script, this turns scenes into structure.

View Isengrim →

How do you install a character skill?

Each is a SKILL.md file inside a ZIP. In Claude, open Customize, then Skills, press +, choose Create skill, then Upload a skill, and select the ZIP. Toggle it on and it is live. Skills work on the Free, Pro, Max, Team and Enterprise plans; the one requirement is code execution, under Settings, then Capabilities. Anthropic documents it in its Skills help article.

In ChatGPT or Gemini there is no uploader: copy the SKILL.md text and paste it into custom instructions, a custom GPT, or a Gem. Loading a character as a skill rather than a pasted message is what lets it survive across separate conversations.

PROMPT - the scene starter

Stay in character as [NAME] until I say OUT OF CHARACTER.

Where we are: [PLACE, TIME OF DAY]
What just happened: [ONE SENTENCE]
Who I am to them: [STRANGER / OLD FRIEND / SOMEONE THEY OWE]
What they want: [ONE SENTENCE]
What I want: [ONE SENTENCE]

Rules:
- Dialogue and small physical action only. No narrating my thoughts, no summarising the scene.
- Two to five sentences per turn. Do not monologue.
- Do not agree just because I pushed. If the character would resist, resist.
- Never break the scene to ask if I am enjoying it.

Open with one line. Do not explain the setup back to me.

In summary:

Write the sheet before the first line: voice, want, refusal, blind spot. Re-anchor every twenty or thirty messages. Use Anouk ($29.00) to build an original character, Isengrim ($29.00) if it is heading toward a game or a script, Zlatko ($29.00) to see a fully specified character in action. Originals only, nothing NSFW, and no character here will tell you it is a person. All work in Claude, ChatGPT and any AI chat, 30-day money-back guarantee.

Skill · SKILL.md · Works with Claude & ChatGPT