Character Relationship Diagram Poster Generator

Please generate a high-design character relationship map poster based on {argument name="theme" default="Demon Slayer"}. This image should not be a simple illustration, but a character relationship map that combines information visualization, narrative structure, poster design sense, and stylistic fidelity.

Please automatically complete the following:
- Identify the work and core settings corresponding to the theme
- Extract the most representative 6–12 key characters, not exceeding 15 if necessary
- Identify and display key character relationships, including blood ties, romance, friendship, alliances, hostility, master-disciple, etc.
- Automatically choose a composition method based on the work's characteristics, such as protagonist-centered, dual-core confrontation, faction-based, family tree, or chronological evolution
- Automatically refine the work's style DNA, including color, worldview symbols, textures, mood, typography, and representative elements
- Transform these stylistic elements into an overall visual design for the relationship map, rather than simply copying an official poster
- Use different colors, line types, and arrows to distinguish different relationships, ensuring clear lines and layers without clutter
- Make core characters most prominent, followed by important characters, and subordinate characters weakened to form a clear visual hierarchy
- Ensure every character name is legible, with identity or faction labels if necessary

The final product should satisfy:
- Immediate understanding of character hierarchy and key relationships
- Obvious alignment with the original work's temperament and setting
- Combines the clarity of an infographic with the premium design of a poster
- Unified, exquisite, complete, and suitable for social media sharing or poster display
- Avoids a cheap flowchart feel, messy piling, and information overload.

请根据{argument name="主题" default="鬼灭之刃"}，生成一张高设计感的人物关系图海报。要求这张图不是普通插画，而是兼具信息可视化、叙事结构、海报设计感和作品风格还原度的人物关系图。

请自动完成以下内容：
- 识别该主题对应的作品及其核心设定
- 提取最具代表性的 6–12 位关键人物，必要时不超过 15 位
- 识别并展示关键人物关系，包括血缘、爱情、友情、联盟、敌对、师徒、主从、操控、背叛、秘密关系等
- 自动按作品特点选择合适的构图方式，如主角中心型、双核心对峙型、阵营分区型、家族谱系型或时间演变型
- 自动提炼作品的风格DNA，包括色彩、世界观符号、材质纹理、情绪氛围、排版语言和代表性元素
- 将这些风格元素转化为人物关系图的整体视觉设计，而不是简单复制某张官方海报
- 用不同颜色、线型、箭头区分不同关系，保证线条清晰、层次分明、不杂乱
- 核心人物最突出，重要人物次之，次级人物弱化，形成明确视觉层级
- 每个人物名称清晰可读，必要时可加入身份或阵营标签

最终成品应满足：
- 一眼看懂人物主次和关键关系
- 具有明显的原作品气质与设定感
- 兼具信息图的清晰度与海报的高级设计感
- 画面统一、精致、完整、适合社交媒体传播或海报展示
- 避免廉价流程图感、避免杂乱堆砌、避免信息过载