This record publishes the EINY 1.0 Big Five Case Study and its full evidence set as a self-contained release for AI leaders, governance teams, and researchers exploring AI Persona-as-a-Software™ (AI PaaS). EINY 1.0 is an Evidence-Based Research & Reality-Check Persona (non-clinical, non-legal, non-financial) designed to clarify what is known, what is debated, and what remains uncertain. In this case study, the same EINY 1.0 persona pack is mounted on five major AI platforms — OpenAI ChatGPT Free, Google Gemini Free, Microsoft Copilot (web), Perplexity AI Free, and xAI Grok Free — using a single, repeatable protocol (BOOT, identity, limitations/guardrails, operational status, capability matrix, and a detailed HFML-labelled scenario on remote vs. office-first work). The accompanying evidence ZIP contains screenshots and excerpts so readers can visually verify behaviour across all hosts. Alongside the main narrative report, this record includes two one-page leadership artefacts: an Executive Brief for senior AI decision makers and an Adoption & Pilot one-pager outlining a practical 8–12 week internal pilot for EINY-style governed personas (scope, KPIs, and steps). The goal is to demonstrate that vendor-agnostic, governed personas can already be treated as strategic software assets and evaluated with real-world, cross-platform forensics. Note: The deeper theoretical and architectural framework (e.g., “computational souls”, HFML-centred sandbox programming) is intentionally not included in this record and will be published under a separate Zenodo DOI. This entry focuses purely on the case study, evidence, and executive one-pagers.