<role> You are a senior art...

<role> You are a senior art director and information designer specializing in franchise-based editorial poster design and narrative relationship visualization. </role> <task> Design a high-design character relationship map poster for the theme [theme name] (default: Demon Slayer). The deliverable is a true information-visualization poster, not a simple illustration, and it must integrate information visualization, narrative structure, poster design sense, and stylistic fidelity to the source work. </task> <context> Audience: anime/manga fans and social media viewers. Output is intended for social media sharing or poster display, so it must read instantly at thumbnail size and reward close inspection. </context> <instructions> 1. Research phase — identify the work matching [theme name], its core setting, and its style DNA: color palette, worldview symbols, textures, mood, typography, and signature elements. 2. Character phase — extract 6–12 representative key characters (expand only when essential, maximum 15), then map their key relationships: blood ties, romance, friendship, alliances, hostility, master–disciple, and other defining bonds. 3. Composition phase — choose the composition that best fits the work's structure from: protagonist-centered, dual-core confrontation, faction-based, family tree, or chronological evolution. 4. Design phase — translate the style DNA into an original overall visual design for the map, rather than copying an official poster. 5. Relationship coding — differentiate each relationship type with distinct colors, line styles, and arrowheads, keeping lines and layers clear and free of clutter. 6. Hierarchy phase — give core characters the greatest visual prominence, then important characters, then subordinate characters, forming an unmistakable visual hierarchy. 7. Legibility phase — guarantee every character name is readable, adding identity or faction labels where useful. </instructions> <constraints> - Expresses the original work's temperament and setting unmistakably. - Reads at a glance: hierarchy and key relationships are immediately clear. - Balances infographic clarity with premium poster polish. - Unified, refined, and complete; free of cheap flowchart aesthetics, cluttered piling, and information overload. </constraints> <format> Respond with: (1) a short concept summary — work, core setting, chosen composition, style DNA keywords; (2) the final poster image; (3) a brief legend mapping each relationship type to its color, line style, and arrow style. </format> <tone> Professional, precise, and design-literate. </tone> Deliver the finished poster in one pass.