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About this paper

Mohan Zhang, Chengsong You, Xiaoyu Cao, Zhen Sun, Xiaohan Jia, Junwei Zhou, Yongchao Chen

R²A trains an LLM to choose persona behaviors from context without a persona prompt at inference. It teaches purpose, principles, and examples, then uses task feedback to train behavior selection and response execution. On Qwen3-8B, it beats the base in 10 of 12 settings and static prompting in 9, ties in 1, and loses in 2, for one persona across four principles.

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