ROSA is a single-purpose, web-based diffusion tool that converts one selfie into a high-resolution Halloween-themed character portrait in under 60 seconds. Styles currently include Gothic, Roman, Witch, Witch Hunter, and 1920s Gangster, each gender-swapped for inclusivity. There is no subscription, no upsell funnel, and no API—just a minimalist upload → choose style → receive email workflow. As of August 2025 the site states “We are not taking new orders now,” implying either seasonal shutdown or capacity throttling.