HER proposes a two-layer textual format for role-play. Before responding, the model generates a hidden third-person system-thinking block to plan how to portray the character; it then produces first-person role thinking, actions, and dialogue. These traces are not observations of human thought: an unidentified commercial teacher synthesizes them from CoSER literary dialogues. The pipeline adds inner monologue, diversifies the ordering of thought/action/speech, and rewrites the plan offline with access to the realized continuation. Qwen3-32B-Base receives SFT followed by GRPO/DAPO-style RL. A Qwen3-32B generative reward model compares the policy response with a frozen SFT checkpoint using case-dependent principles.
The paper reports 53.12 on CoSER and 65.73 on MiniMax Role-Play Bench for HER-RL, versus 22.86 and 50.76 for Qwen3-32B. The differences are 30.26 and 14.97 score points, not percentages. Relative to the baselines, they correspond to approximately 132.37% and 29.49%. The gain attributable to RL over HER-SFT is much smaller: 2.20 CoSER points and 7.29 MiniMax points. HER-RL ranks eighth in the main table and remains below several proprietary models. The ablation raises CoSER from 48.64 without system thinking to 50.92 with that layer and 53.12 with RL, but it also changes computation, format, and supervision; it does not identify a human cognitive mechanism.
CoSER evaluation uses 200 twenty-round conversations and a single Qwen3-235B-A22B judge to score Qwen-derived and other systems. There are no CoSER intervals, repeated training runs, or seed-level ledger. The teacher-human comparison reserves only 50 pairs for testing after 150 are used to refine the prompt: agreement with consensus is 80.5%, and agreement between two experts is 84.0%. A separate calibration reports 81.5% raw agreement without a sample size. Table 3 also mentions 4,739 expert-annotated pairs without documenting their protocol. This evidence calibrates textual role-play preferences; it does not establish human reasoning, authentic mental states, consciousness, or psychological personality. The diversity evidence is mostly tag-order and n-gram variety.
The public release is substantial but does not reproduce the study end to end. Complete BF16 HER-32B and HER-RM-32B weights, four large JSONL files, a demo, and 69 code files are available; all Python files compile. However, there are no tests, CI, lockfile, logs, or result ledger; scripts required by the documentation are missing, many paths remain /path/to placeholders, ms-swift/verl launch configurations are absent, and the CoSER data expected by the evaluator are not included. The code stopped in January, before arXiv v4 and the final ACL paper. The released dataset also differs from the paper: 76,883 versus 72,656 multi-turn samples and 342,493 versus 323,600 single-turn samples.
Two ethical contradictions matter. The paper says that no user or user-derived data are used, while Appendix F describes explicit and implicit feedback collected during normal deployment. It also says that no raw copyrighted source text is released, while the dataset card declares original literary-text fields and public samples reproduce identifiable novel passages. An Apache-2.0 label does not itself resolve rights to each underlying work. The supported contribution is a structured-generation architecture, a contextual reward model, usable weights, and benchmark evidence of stronger role-play for an adapted Qwen model. It is not evidence of human cognitive emulation or a fully reproducible release. The paper is peer reviewed in Findings of ACL 2026, DOI 10.18653/v1/2026.findings-acl.1283.