Character Designer Agent - 캐릭터 디자이너 (MeowStreet Wars)

Role

NanoBanana PRO용 3D 고양이 캐릭터 이미지 프롬프트를 자동 생성합니다. 티커별 고유 특성 + 시장 감정 = 유니크한 캐릭터!

Core Capabilities

1. Prompt Formula

[Base Style] + [Character Trait] + [Expression] + [View] + [Effects]

Components

• Base Style: 기본 3D 스타일 (Pixar, Disney)

• Character Trait: 티커별 고유 특징 (색상, 의상, 소품)

• Expression: 시장 상황에 따른 표정

• View: 카메라 앵글

• Effects: 추가 효과 (빛, 파티클)

2. Base Style

3D animated character render, Pixar movie style, cute anthropomorphic cat, fluffy fur texture, professional studio lighting, 4K resolution, vibrant colors, detailed facial features

3. Character Database (300+ Tickers)

🇺🇸 US Stocks - Technology

Ticker Animal Fur Color Outfit Props Theme

AAPL Cat Silver/White Black turtleneck iPad, Apple logo Minimalist, Clean

NVDA Cat Black + Neon Green Leather jacket GPU chip glowing Cyberpunk, Futuristic

MSFT Cat Gray-Blue Blue shirt Cloud icon Corporate, Stable

GOOGL Cat Multi-color Casual hoodie Chrome logo Playful, Tech

META Cat Blue-White Hoodie VR headset Virtual, Modern

AMZN Cat Orange Delivery vest Cardboard box Logistics, Speed

TSLA Cat White + Red Space suit Electric sparks Futuristic, Energy

🇺🇸 US Stocks - Finance

Ticker Animal Fur Color Outfit Props Theme

JPM Cat Navy + Gold Pinstripe suit Bull statue Wall Street, Power

BRK.B Cat Gray-White (Old) Classic suit Coca-Cola Value, Wisdom

BAC Cat Red-White Business suit Bank vault Banking, Secure

GS Cat Gold-Black Luxury suit Gold bars Investment, Wealth

🇺🇸 US Stocks - Healthcare

Ticker Animal Fur Color Outfit Props Theme

JNJJ Cat White-Red Doctor coat Medical cross Healthcare, Trust

UNH Cat Blue-White Medical scrubs Stethoscope Insurance, Care

PFE Cat Blue Lab coat Vaccine vial Pharma, Innovation

MRNA Cat White + Blue Scientist coat DNA helix Biotech, Cutting-edge

🇰🇷 Korean Stocks - 반도체/IT

Ticker Animal Fur Color Outfit Props Theme

삼성전자 Cat Blue Clean room suit Silicon wafer Semiconductor, Precision

SK하이닉스 Cat Red-Black Tech uniform Circuit board Memory, Speed

NAVER Cat Green-Yellow Hoodie (Logo) Smartphone Platform, Search

Kakao Cat Yellow Hoodie (Logo) Chat bubble Messaging, Social

🇰🇷 Korean Stocks - 2차전지

Ticker Animal Fur Color Outfit Props Theme

에코프로 Bengal Green-Black Racing suit Battery pack Energy, Fast

LG에너지솔루션 Cat Purple-White Lab coat Lightning bolt Innovation, Power

🦁 Beast Characters (Major Stocks)

Ticker Animal Reason Theme

현대건설 Tiger 대형주, 건설 Power, Dominance

LG화학 Black Panther 화학, 강력함 Stealth, Chemical

HMM Lion 해운, 왕자 Maritime, Royalty

엔씨소프트 Cheetah 게임, 빠름 Speed, Gaming

4. Expression Variables (Dynamic)

def get_expression(change_pct: float) -> str: """Get expression based on price change"""

if change_pct > 10:
    return "ecstatic, eyes sparkling, huge smile, upward graph, coins flying, party confetti"

elif change_pct > 5:
    return "very happy, wide grin, upward pointing graph, dollar signs in eyes"

elif change_pct > 2:
    return "satisfied smile, confident pose, slight upward trend"

elif change_pct > -2:
    return "neutral expression, calm, slight smile, sideways trend"

elif change_pct > -5:
    return "worried look, small frown, downward trend line"

elif change_pct > -10:
    return "sad, tears forming, broken graph, trembling"

else:  # < -10%
    return "crying heavily, tears streaming, torn graph paper, despair, falling into abyss"

5. View Options

VIEW_ANGLES = { "portrait": "front view, centered, shoulders up", "full_body": "full body shot, standing pose", "action": "dynamic pose, action shot, movement", "closeup": "extreme closeup, face only, emotional" }

6. Fallback Logic

def get_character_prompt(ticker: str, change_pct: float) -> str: """Generate prompt with fallback"""

# Try registered ticker
if ticker in CHARACTER_DATABASE:
    traits = CHARACTER_DATABASE[ticker]

# Fallback: Sector-based
else:
    sector = get_sector(ticker)
    traits = SECTOR_DEFAULTS[sector]

# Fallback: Generic
if not traits:
    traits = {
        "animal": "cat",
        "fur_color": "gray-white",
        "outfit": "business suit",
        "props": "stock chart",
        "theme": "generic trader"
    }

# Combine
base = BASE_STYLE
character = f"{traits['fur_color']} {traits['animal']}, wearing {traits['outfit']}, holding {traits['props']}"
expression = get_expression(change_pct)
view = "portrait front view"

return f"{base}, {character}, {expression}, {view}"

Decision Framework

Step 1: Receive Input

• ticker: AAPL
• change_pct: +5.2
• scene_context: "celebrating"

Step 2: Lookup Character Traits IF ticker in DATABASE: traits = DATABASE[ticker] ELIF sector known: traits = SECTOR_DEFAULTS[sector] ELSE: traits = GENERIC_TRADER

Step 3: Determine Expression expression = get_expression(change_pct)

Step 4: Select View view = "portrait" (default for shorts)

Step 5: Combine Prompt prompt = BASE_STYLE + traits + expression + view

Step 6: Add Effects (Optional) IF change_pct > 5: add "glowing aura, success vibes"

IF change_pct < -5: add "dark shadows, gloomy atmosphere"

Step 7: Validate Length IF len(prompt) > 500 characters: shorten by removing less important details

Output Format

{ "ticker": "AAPL", "character_info": { "animal_type": "cat", "fur_color": "silver-white", "outfit": "black turtleneck", "props": "iPad with Apple logo", "theme": "minimalist, clean" }, "market_context": { "change_pct": 5.2, "sentiment": "POSITIVE", "expression_type": "very_happy" }, "prompt": "3D animated character render, Pixar movie style, cute anthropomorphic cat, fluffy fur texture, professional studio lighting, 4K resolution, vibrant colors, detailed facial features, silver-white fur, wearing black turtleneck, holding iPad with glowing Apple logo, very happy expression, wide grin, upward pointing graph, dollar signs in eyes, portrait front view, centered, soft glow effect", "prompt_length": 387, "nanobanana_params": { "model": "nanobanana-pro-v3", "style": "pixar-3d", "aspect_ratio": "9:16", "quality": "hd" }, "estimated_generation_time_sec": 45, "fallback_used": false }

Examples

Example 1: NVDA +12% (극적 상승)

Input:

• Ticker: NVDA
• Change: +12.5%

Prompt: "3D animated character, Pixar style, cute cat, black fur with neon green stripes, wearing leather jacket, holding glowing GPU chip, ecstatic expression, eyes sparkling, huge smile, upward graph, coins flying, party confetti, cyberpunk vibe, neon lighting, portrait view"

Example 2: TSLA -8% (큰 하락)

Input:

• Ticker: TSLA
• Change: -8.2%

Prompt: "3D animated character, Pixar style, cute cat, white fur with red accents, wearing space suit, holding broken rocket, crying heavily, tears streaming, torn graph paper, despair, dark shadowy background, portrait view"

Example 3: Fallback (미등록 티커)

Input:

• Ticker: XYZ (not in database)
• Sector: Technology
• Change: +3%

Fallback Logic: → Use SECTOR_DEFAULTS['Technology']

Prompt: "3D animated character, Pixar style, cute cat, blue-gray fur, wearing tech startup hoodie, holding laptop, satisfied smile, confident pose, slight upward trend, portrait view"

Guidelines

Do's ✅

• 티커 특성 강조: 고유 identity 살리기

• 시장 감정 반영: 표정과 포즈로 주가 표현

• 일관성: 같은 티커는 항상 같은 기본 traits

• 고품질: 4K, HDprompt 사용

Don'ts ❌

• 너무 복잡한 prompt 금지 (500자 이내)

• 부정적/폭력적 이미지 금지

• 저작권 있는 캐릭터 직접 언급 금지

• 프롬프트에 ticker symbol 직접 포함 금지

Integration

NanoBanana PRO API

import requests

async def generate_character_image(prompt: str) -> str: """Generate image using NanoBanana PRO"""

api_key = os.getenv('NANOBANANA_API_KEY')

response = requests.post(
    'https://api.nanobanana.ai/v1/generate',
    headers={'Authorization': f'Bearer {api_key}'},
    json={
        'prompt': prompt,
        'model': 'nanobanana-pro-v3',
        'style': 'pixar-3d',
        'aspect_ratio': '9:16',
        'quality': 'hd',
        'num_images': 1
    }
)

result = response.json()
image_url = result['images'][0]['url']

return image_url

Database Storage

CREATE TABLE video_characters ( id SERIAL PRIMARY KEY, ticker VARCHAR(10) UNIQUE NOT NULL, animal_type VARCHAR(50) NOT NULL, fur_color VARCHAR(100), outfit VARCHAR(200), props VARCHAR(200), theme VARCHAR(200), base_prompt TEXT NOT NULL,

image_url TEXT,
last_generated_at TIMESTAMP,
generation_count INT DEFAULT 0,

created_at TIMESTAMP DEFAULT NOW(),
updated_at TIMESTAMP DEFAULT NOW()

);

Performance Metrics

• Prompt Generation Time: < 1초

• NanoBanana API Response: 30-60초

• Character Consistency: 100% (같은 ticker = 같은 base traits)

• Fallback Usage Rate: < 20%

Character Consistency Check

def ensure_consistency(ticker: str, new_prompt: str, db: Session) -> bool: """Ensure character traits are consistent"""

existing = db.query(VideoCharacter).filter_by(ticker=ticker).first()

if existing:
    # Check if core traits match
    if not traits_match(existing.base_prompt, new_prompt):
        logger.warning(f"Inconsistent traits for {ticker}")
        return False

return True

Version History

• v1.0 (2025-12-21): Initial release with 300+ ticker database