I don't know whether the days of turbulent events finally bore fruit, or if it was just pure luck, but Jeanne actually saw a member of the Six Dragons Sect—or, to be more precise, "an individual Xiang Shan believed was most likely a member of the Six Dragons Sect."
Tumor Xiang Shan possessed extremely strong inner strength, allowing him to read a person's movements in detail and understand their psyche, completing a personality profile through observation.
All members of the Six Dragons Sect shared similar spiritual characteristics.
This manifestation of spiritual characteristics in movements was not a specific detail or parameter but a "general feeling" abstracted by humans after integrating numerous behavioral habits. It was a differentiation hard for machines to achieve.
Ever since encountering this mysterious force on Mars, Xiang Shan had been honing his observational skills to ensure he could identify members of the Six Dragons Sect more quickly from within a crowd.