Character Design

Ch06 Character Design & Worldbuilding

Good characters are the reason viewers follow a series past episode 5. Users chase plot satisfaction points until episode 5, but only users who genuinely like the protagonist stay through episode 20. In AI production workflows, character sheets are also the primary consistency tool — without them, AI will "forget" what the protagonist said in episode 1 by episode 8.

The Character Sheet: Complete Template

[Character Sheet Template]

CHARACTER SHEET

Basic Information
──────────────────────────────
Name: [Full name + nickname if applicable]
Age: [Specific number, not "mid-twenties"]
Appearance: [3-5 precise visual traits — these become your image generation prompt]
             Example: ~182cm tall, clean-cut short hair, sharp eyes,
             typically in dark suits, small scar on left wrist
Role/Status: [Current visible position + real hidden position if applicable]

Personality System
──────────────────────────────
Core personality words (3): [e.g.: composed, patient, protective]
Surface behavior pattern: [How do they act toward enemies? Toward people they trust?]
Internal behavior pattern: [What do they truly care about? What breaks their composure?]
Speech style: [Verbose/terse? Preferred vocabulary? How does their speech change under stress?]

Background & Motivation
──────────────────────────────
Primary goal: [What do they ultimately want to achieve in this story?]
Core fear: [What do they most fear losing or becoming?]
Formative trauma: [1-2 key past events that shaped who they are]
True vs stated motivation: [Gap between surface motivation and real motivation]

Weaknesses (Critical!)
──────────────────────────────
Character flaw: [One trait that causes them to make mistakes]
Emotional weakness: [One situation that destabilizes them]
Competence blind spot: [One area where they genuinely struggle — adds realism]

Consistency Tests
──────────────────────────────
Things this character would NEVER do: [3-5 behaviors their personality rules out]
Things this character ALWAYS does: [Fixed reactions to specific triggers]

[NOTE] Why Weaknesses Matter More Than Strengths Perfect protagonists are boring. Viewers empathize not because a character is powerful, but because their flaws resonate with universal human experience. The most beloved CEO drama protagonists aren't omnipotent business geniuses — they're characters who are ruthless in boardrooms but completely helpless with emotions. That contrast creates authenticity.

The Protagonist Triangle

Core Role · Protagonist

Protagonist

Function: The emotional identification vehicle — the audience's point of view. Design principle: Viewers must want to root for them — not because they're perfect, but because their situation triggers justice instinct, identification, or emotional resonance.

Core Role · Antagonist

Antagonist

Function: The source of conflict and satisfaction points — the target of reversals. Design principle: Must have understandable motivation — not just a "villain" label. Audiences should understand their logic even if they don't agree. One vulnerable moment makes the antagonist real.

Core Role · Ally

Ally

Function: Narrative function (advance information/provide resources) + emotional function (reflect protagonist's character). Design principle: Must have their own subplot — they're not a "utility character." Three ally archetypes: loyal partner, contrast-comedy type, silent protector.

AI Consistency: System Prompt Design

The most effective solution to AI "forgetting" character setup is converting your character sheets into a System Prompt injected at the start of every conversation session.

[Character Consistency System Prompt]

You are the script assistant for the short drama "Shadow Empire."
In our conversation, always enforce these character constraints:

[MALE LEAD CONSTRAINTS]
Chen Ming = calm, patient, few words
✓ He WILL: Express care through action not words, remain composed in danger
✗ He WON'T: Express emotions publicly, use excited tone,
             confess to Lin Yue before Episode 8

[FEMALE LEAD CONSTRAINTS]
Lin Yue = assertive, direct, strong exterior / soft interior
✓ She WILL: Confront others directly, refuse to show weakness
✗ She WON'T: Voluntarily show vulnerability, trust Chen Ming before Episode 12

[CONFIRMED STORY FACTS]
- They've known each other for 3 weeks (current: Episode X)
- Antagonist Liu Hao does not know Chen Ming's real identity
- [Other confirmed key events]

If I propose a scene that violates these constraints,
flag the violation and offer a compliant alternative.

Supporting Character Types

[TIP] Chapter Action Checklist

1. Complete 3 character sheets (protagonist, antagonist, main ally) — each must include a "would never do" list.
2. Design your triangle relationship diagram — mark initial and final relationship states, find 2 moments where the triangle breaks.
3. Build your worldbuilding rules document with at least 4 dimensions (power structure / timeline / ability limits / plot restrictions).
4. Convert your character sheets into an AI System Prompt using this chapter's template. Generate the key scene from Episode 1 using it and verify character behavior matches the design.