1. We develop and release Hecate-Omni, a model for multimodal social intelligence reasoning, designed to handle diverse social behavior tasks spanning emotion recognition, mental-state analysis, sentiment understanding, and pathological behavior recognition. Hecate-Omni achieves SOTA on the evaluated benchmarks, demonstrating effective and robust reasoning across different social behavior scenarios. 2. We introduce Hecate-PO. Hecate-PO adaptively identifies latent reasoning units using predictive entropy and establishes correspondences among equivalent reasoning states through internal state representations, enabling reasoning decisions to be evaluated under semantically comparable…