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Personascope: Measuring how deeply LLMs adopt personas
Benji Berczi, Kyuhee Kim, James Requeima, Sid Black, Cozmin UdudecThis is work done by Benji and Kyuhee during MATS Winter 2026, mentored by Cozmin Ududec, and advised by James and Sid.Figure 1. A model can take on a persona fully in voice while not changing its behaviour at all. The x-axis (Persona-Adoption Depth, PAD