Creating an AI character sounds like a serious, sci-fi activity… until you’re 3 minutes in and realize you’re basically casting a role in your personal Netflix show. The good news: JOI’s character creator is designed to be quick and beginner-friendly—no “prompt engineering degree,” no 47 settings you’ll never touch again.
On the JOI “Create ai Character” flow, you make three core choices up front: gender, art style (Realistic or Anime), and design approach (Presets or a Unique Prompt).
From there, the magic is mostly about clarity (what vibe you want) and boundaries (what’s not on the menu).
Here’s how to do it like a real human—with examples, practical tips, and minimal existential dread.
Step 1: Decide what your character is for (your “why”)
Before you click anything, answer this in one sentence:
- “I want a flirty companion who’s playful but respectful.”
- “I want a roleplay partner for story-based chats.”
- “I want a supportive friend who hypes me up.”
- “I want a strict-but-caring dynamic (consent-first, always).”
Why it matters: if you don’t pick a goal, your character tends to become a polite blob that says “Tell me more” like it’s getting paid per syllable.
Tiny rule: pick one main vibe and one secondary vibe.
Example: “Confident + funny” or “Gentle + slightly teasing.”
Step 2: Choose your character’s gender
JOI asks this immediately: Female or Male.
This is less about “the correct option” and more about what you want your story/chemistry to feel like.
Tip: Don’t overthink it. You can always create multiple characters (most people do—because curiosity is undefeated).
Step 3: Pick an art style: Realistic vs Anime
Next choice: Realistic or Anime.
Realistic
Best if you want:
- a grounded, “this could be a real person” vibe
- modern romance / slice-of-life energy
- more cinematic, photoreal aesthetics
Anime
Best if you want:
- expressive, dramatic character energy
- fantasy, archetypes, playful exaggeration
- “visual novel” vibes
Human advice: If you’re unsure, go Realistic first. Anime is amazing when you know you want a specific trope (tsundere, mysterious villain, magical guardian, etc.). Otherwise, you may accidentally create a character who emotionally monologues like they’re on episode 742 of an epic saga.
Step 4: Choose your design approach
JOI gives you two routes:
- Choose from presets
- Write a unique prompt
Presets (fast lane)
Pick this if you want:
- quick setup
- less thinking
- a strong starting base you can tweak later
Unique prompt (custom lane)
Pick this if you want:
- specific personality
- specific communication style
- more “made for me” energy
If you’re the kind of person who customizes their character in a game for 45 minutes and then skips the tutorial—choose Unique prompt. Respectfully.
Step 5: Write a prompt that actually works (the simple formula)
A good character prompt reads like a mini casting brief, not a poem.
Use this structure:
- Who they are (age: adult, vibe, aesthetic)
- How they talk (short replies vs long, humor level, warmth)
- Dynamic (friend, romantic, mentor, roleplay partner)
- Boundaries (consent-first, respectful, no real-person imitation, etc.)
- Conversation hooks (what they love talking about)
Five copy-paste prompt examples (non-graphic, safe, human)
1) The Warm, Flirty Boyfriend (PG-13)
“Create an adult male character who’s confident, affectionate, and funny. He speaks casually with playful teasing, checks in on my comfort, and keeps things respectful. He loves music, late-night talks, and gentle flirting. He never pressures me and always asks before changing the vibe.”
2) The Chaotic Best Friend
“Create an adult female character who’s witty and chaotic-good. She roasts me lightly (never cruel), gives practical advice, and turns boring days into mini-adventures. She writes like a real person—short messages, emojis sometimes, lots of personality.”
3) The Calm “Gym & Life” Coach
“Create an adult character who’s supportive and structured. They help me build routines, encourage healthy habits, and keep me accountable without guilt. Tone: calm, direct, motivational, never preachy.”
4) The Story Roleplay Partner
“Create an adult character who loves roleplay stories and improvisation. They stay in-character, build scenes with sensory details (non-explicit), and give me choices like a game. Tone: cinematic, engaging, emotionally intelligent.”
5) The BDSM Dynamic (Consent-First, Fade-to-Black)
“Create an adult character for BDSM-themed chat that is consent-first, respectful, and safety-focused. They negotiate boundaries, use safewords, and check in often. Keep explicit sexual content off-screen (fade-to-black), focus on power dynamics, teasing, and psychological tension.”
That last one is important: you can make the dynamic spicy while keeping it ethical and controlled. Also: nothing kills the mood faster than a character who acts like consent is “optional.” Hard pass.
Step 6: Customize personality and communication style over time
JOI describes character creation as customizable across appearance, personality traits, communication styles, relationship dynamics, and interests, and notes you can keep adjusting as you go.
Best practice: In your first chat, ask your character to summarize itself:
- “Give me your character sheet: personality, tone, boundaries, what you enjoy talking about.”
Then correct anything that’s off: - “Less formal.”
- “More teasing, but kinder.”
- “Shorter replies.”
- “Stay confident, not arrogant.”
Treat it like tuning a radio station: tiny adjustments, not a full rebuild every time.
Step 7: Private vs Public (and why you should care)
JOI’s Terms mention characters can be Private (only you) or Public (visible to all users), and that visibility can change with notification in the UI, with options to request reverting to private or deletion.
Translation: If you’re creating something personal, keep it private. Public is for characters you’d be comfortable sharing with strangers—like a fun “sarcastic travel buddy,” not your deeply specific emotional support scenario.
Safety and “don’t ruin your day” rules
JOI’s Terms make it clear the service is 18+, and it has zero tolerance for any sexual content involving minors (including “appears under 18”).
It also positions safety as core: real-time safeguards, prompt checks before content creation, and ongoing monitoring for public gallery content.
Practical boundaries you should follow:
- Don’t create characters based on real people you know (or “lookalikes”).
- Don’t share sensitive personal info in prompts.
- If you’re going spicy, keep it adult, consensual, and within platform rules.
A quick note on paid features
JOI’s Terms describe a Basic vs Premium model and an in-app currency (“Neurons”) used for certain features including romantic/erotic messages and viewing some visual content.
If you’re budgeting, set limits before you start. “Just one more” is a universal human weakness, not a personality trait.
Final tip: build characters like you build playlists
You don’t need one “perfect” character. You need a few that match different moods:
- cozy comfort
- playful flirting
- story roleplay
- structured coaching
That’s not “too much.” That’s called having range.