MatrAIx Persona 1M is a persona dataset released by MatrAIx, designed to provide fine-grained and diverse persona data for scenarios such as synthetic data generation, crowd modeling, personalized dialogue, simulation and evaluation. This dataset contains 999,847 character profiles, of which 599,847 are derived from real-world records and 400,000 are synthesized from a complete DAG. Each profile is described by 1,290 categorical attributes, covering dimensions such as demographics, language, profession, skills, personality, values, interests, behavior, health, and developer characteristics. Records of individuals under the age of 18 have been removed.

Dataset composition:

• Extracted from Wikipedia: 323,438 entries
• Stack Overflow survey: 113,120 results
• Amazon review extract: 97,915
• Comprehensive social survey: 63,532 items
• PRISM alignment: 1,487
• Real-world human survey: 355 items
• Full DAG synthesis data: 400,000 entries

Data fields:

• source, source_row_index, source_record_id: Data source and traceability information.
• attributes: 1,290 attributes stored in the package.
• null_bitmap: Bitmap with missing attributes
• attribute_overrides: Overrides of exact attribute values beyond the encoding table.
• populated_attribute_count: The number of non-empty attributes in the current row.
• has_description, description_count, descriptions: Natural language description fields
• Grounding: Field-level evidence, confidence level, and assignment type
• metadata_json: Source-specific metadata