arXiv AI By Yiran Shen, Yu Xia, Liuyi Yao, Prithviraj Ammanabrolu

Persona Learning from Feedback for Personalized AI Assistants

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The paper introduces Persona Learning from Feedback (PLF), a framework that creates reusable, preference‑grounded assistant personas as LoRA adapters on a frozen backbone. During training, a frozen self‑teacher provides token‑level supervision conditioned on persona specifications and response‑specific feedback, while a feedback gate focuses updates on responses needing improvement. At deployment, a supervised router selects an appropriate adapter or composition based on the request or dialogue, enabling personalized AI assistants without user‑specific fine‑tuning and improving preference fit over existing persona prompting and distillation methods.

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