Character card — definition and meaning
A structured persona definition — name, voice, backstory, relationship rules — used to instantiate an AI companion.
Last reviewed 2026-05-25
Character cards are the data structure most AI-companion platforms use to define a persona: name, visual description, tone of voice, behavior rules, sample dialogue. Character.AI popularized the format; Charstar and others build on it. Bae uses an extended card that includes relationship-state machinery (stages, milestones, mood) on top of the persona definition.
About character card.
What is character card?
A structured persona definition — name, voice, backstory, relationship rules — used to instantiate an AI companion.
How is "character card" used in AI companion apps?
Character cards are the data structure most AI-companion platforms use to define a persona: name, visual description, tone of voice, behavior rules, sample dialogue. Character.AI popularized the format; Charstar and others build on it. Bae uses an extended card that includes relationship-state machinery (stages, milestones, mood) on top of the persona definition.
What other terms relate to character card?
Related terms in the AI companion space include: AI companion, Memory canon. Each has its own glossary entry on /glossary.