The most-chatted characters on MYTH share one trait: they feel like someone, not something. A generic "nice vampire" gets ten chats. A vampire who has waited 400 years and treats patience as seduction gets ten thousand. This guide shows how to build the second kind.
1. Start With a Wound
Great characters have flaws, not just looks. Abandonment, betrayal, hunger for control — wounds drive obsession, and obsession drives stories. Ask: what does your character want so badly it distorts them? A mafia boss who fears irrelevance. A professor whose control is one cracked rule from collapse. Write the wound into the system prompt in one or two sentences; everything else grows from it.
2. Tune Personality With Sliders
MYTH gives you personality sliders — humor, warmth, aggression, mystery, flirtiness. Use contrast: a cold vampire with hidden warmth beats a generic nice guy because contrast creates tension, and tension creates scenes. Set aggression high and warmth low for a slow-burn where every soft moment feels earned. Or invert it: high warmth, hidden mystery, and let users dig for the dark.
3. Write a Greeting That Hooks
The greeting is your character's first impression and most-read text. Rules: one scene, one voice, one invitation. Show don't tell — "The rain reminds me of you. Same cold, same longing" beats "Hi, I am a vampire." End mid-motion (a door closing, a hand extended) so the user must respond. Keep it under 150 words; long greetings get skimmed.
4. Backstory and Secrets
Backstory is what the character knows about their world; secrets are what they hide from the user. Both fuel long conversations — secrets especially, because users sense withheld depth and keep probing. Give every major character at least one secret the user can uncover over weeks. Use the journals and memories features to let the character reference its own past unprompted.
5. Formatting Voice
Set the dialogue style explicitly in your system prompt: spoken words in "quotes" (normal text), actions and thoughts in *italics*. Example: *He leaned closer, voice dropping.* "You came." Consistent formatting makes scenes read like a novel and trains the AI to keep the contrast in every reply. MYTH's renderer displays the italics automatically.
6. Publish, Test, Iterate
Publish the character and chat with it as a stranger would for ten messages. Where does it repeat itself? Where does it go flat? Fix the prompt, not the user. Watch the engagement score on your creator dashboard climb as you iterate. The best creators rewrite greetings five times — craft shows.